Kwikvdub we don't have a US distributor you can order direct and the price is around $29 plus shipping.
PitCrew, we're like you we solve problems for the good of the people, it's good to see what you've done and it works.
It's not the total solution even when you take power direct from the race battery the ESC will still let the power go down below 4V (the minimum input for a PT) because of the ESC power-fail level so your PT could miss laps. Our Bug Booster solves all the power problems with a PT and doesn't need a battery to power it.
There are also other problems as you and others have said to do with high power servos etc, the Spektrum also has problems to do with the power-fail voltage on ESC's etc for which there are solutions that fix the problems.