Yes, the exact same one Jeff mentioned earlier in this thread.
http://www.parts-express.com/aurasound-ast-2b-4-pro-bass-shaker-tactile-transducer--299-028
and the same 4 small ones.
I'm still experimenting, but following on from Jeff's advice, here would be my minimum setup & it is very enjoyable to drive:
One USB 5.1 soundcard £9.99 Amazon
One Lepai 2020A mini Amp with UK power supply £23.99
4 Dayton Audio TT25-16 Puck Transducers (Parts Express USA $44.50 / £28 plus shipping)
Simvibe software download $89 / £55
Grand total: £145
1) Install soundcard
2) connect mini amp to soundcard (green 3.5mm socket of soundcard --> the two phono sockets of the mini amp)
4) connect pucks to your rig - I won't go into this, it depends on your setup and your own creativity & experimentation, & I am no expert, but fix two front (under pedals)and two rear(under/behind seat).
3) connect front left and rear left puck cables into left channel of amp.
4) connect front right and rear right puck cables into right channel of amp.
5) install software and follow instructions to get up and running - in Windows control panel, set the soundcard to quadrophonic; and in simvibe software, use chassis mode.
With only one mini amp, the effects have to be combined so you do not get the 4 corner effects, but after a couple of hours of adjusting, I had an engine/road/rumble feel that really added immersion to my game.
Future addons: I have the large Aura shaker bolted on but still waiting to be included in the mix, so I may well buy an extra soundcard & two more mini amps to expand it all. Then I can have two amps (4 channels) for the corners of the car, and the third amp will control the engine (and shifter) under the seat.
A further option would be to add another transducer under the pedals for extra engine/shifter feel.
My only concern is whether the next soundcard will use the same drivers as the first and cause conflict with the first one -, but time will tell.