Hi Cameron,
If you're
"going to do whatever it takes for this first race" then I'm obliged to help you.
I'll check with friends in other classes to see if they will be attending the April race because I want all of our NorCal 944-Spec racers to be there.
NASA TT has a limited number of transponders for rent but their TT guys have priority.
If all else fails you can listen to a experienced racer like Chris and schmooze your regional director.
I'm sure we can work out a rent to own plan.
btw- I'm not a big fan of the rechargable transponder.
Remembering to recharge your transponder, forgetting to bring your charger and/or transponder from your home or hotel, etc. is just another thing you to have to worry about.
We just pre-wire the transponder and the car with quick disconnects to move the transponder between cars.