TeeDee crank shafts in both LH and RH are usually on e-bay----- the hard part to find anymore is the main crank case---- second hardest to find are new .051 Piston cylinder sets...almost all other bits are found from several sources...MECOA, Cox Intentional, Ex-model engines, and several e-bay sellers
I have enough new parts from Cox international and e-bay to build about 5 new TeeDees or Medallions....I think all were Buy It Now sales and no auction non sense
IN fact I bought several of the so call high performance TeeDee crank shafts and my testing did not show them to be any better than the stock crank shaft
I use a lot of TeeDees on combat plane for personal fun fly and training saving the more expensive FAST engines for competition, That and the fact that a TeeDee in the dirt is no big deal while a ball Bering .049 engine must be well cleaned before re-starting
In my opinion the ONLY reliable way to run a TeeDee with opened up venturi is on bladder pressure
I have several with the factory port opened Or a back case cover port into hard tanks....and they are finicky, usually requiring a starter motor
But the bladder fed engines fire off prime by finger just fine and scream to life once the pinched fuel line is opened