http://www.pttguy.com/html/_pilot_line1.html

Each system is built by me, tested twice during the process and
once again before packaging. Every system comes with a headset consisting of one
speaker a mic. The speaker will take most radios at full volume but be warned it
is very loud and the mic when placed properly will pick up little to no wind
noise though a windsock should be used if you use this system while on a
motorcycle. Note: My headsets are designed for full face helmets and does not
have the mic boom of that type headset but you may adapt for that if you wish.

http://flytec.com/accessories.html

Compact finger switch with 50" lead

Available for Yaesu, Icom, Kenwood

Available for full face or open face helmets

All components available individually

http://glidercom.com/store/ptt_mics.html

Priced from $45.00

Economical choice for full face helmets

Excellent audio quality

Tough polyurethane cables

Finger Push-to-Talk button included

Reduced size helmet Bluetooth module.

Full-Face or Open-Face helmet headsets

Eliminate the long wires and cables!!

Wireless PTT button with clip

Noise canceling microphone element High output speaker

From their sales office:

Any of our headsets will work with either radio, but I would
recommend avoiding the 250 as the headset plug is problematic.

No adapter is needed in either case. All our headsets play well with these
radios and there are no rf interference issues between the radio and headset.

http://www.thermaltracker.com/shop1.htm

http://www.gadgetinfinity.com/full-face-helmet-headset.html

Helmet headset for full-face helmet user;

Comes with an extra finger PTT wire with Velcro tape to be attached on the
handle bar;

Two speakers and one microphone with 3M adhesive tape to be attached inside the
helmet;

Wire length: 1 ft / 30cm from plug to PTT unit;

1.5 ft / 45cm from PTT unit to mini-din connector;

1 ft / 30 cm from mini-din connector to 2.5 ft / 75 cm from speakers and mic;


Weight: 166g;

https://www.motocomm.com/products.php?ItemID=3259&ProductCatID=174

Open-Face Helmet Headset with Mini PTT Switch

http://www.xcshop.com/shop/product.php/244/xconnect-radio-ptt

It is a two-piece boom mike that integrates with either full face
or open face helmets.

The system is made from a tough, 3.5mm rubber-coated wire, sprung coiled to
absorb the inevitable pulls and tugs that happen when you are using them.

The button feeds down your jacket arm and fastens with Velcro to your finger
making chat instant and stress-free.

This system has been widely tested by many top guides. It works, season after
season.

http://www.ridethespiral.net/?product=rts-head-set-closed-face-with-ptt-switchbox

These RTS Headsets are absolutely BOMB PROOF ! Designed after much
testing and prototyping. All the parts of my systems are interchangeable. So
that means you can by a closed face design with a PTT finger button or a closed
face design with a switchbox etc etc, chop and change the designs for your
needs, all parts fit together perfectly :)

1 Year warranty. If you have a radio with a different connection type then a
unit can be custom made for you.

The unit comes with an elastic band for locking on when towing. A lock on switch
was in the prototypes but was sometimes accidentally left in the locked position
so this system was decided on.

Some of these products look remarkably similar.