On the other hand, if you want to avoid having anything AMB in your car, get a clone or new PT with custom lead lengths/colour LED's etc.
They can even supply one in shrink wrap for 1/12 cars!
PTX Personal Transponder
Stored ID's: 10 or 20, also 20+1 (+1 Custom ID or Cloned ID)
Case version: 22 x 16 x 9mm, waterproof and fuelproof
Shrink version: 22 x 13 x 8mm, not waterproof (indoor use)
Weight: approx 6g case, 2g shrink (without power lead)
Mounting: direct fitting base or tab case (3 hole base)
Temperature range: 0-50 C
Power feed: from a free RX channel (or 'Batt')
Power lead: approx 190mm or custom (replaceable lead)
Connection plug: standard servo plug
Operating voltage: 2.8V - 30V DC
Power consumption: approx 7.5mA @ 6V DC
Display LED: standard or custom colour options