Hi!
Ofcourse ...I buy them from Dave Shadel(former World champ in pylonracing).
US YS importer. Just contact Performance Specialties in Nevada.
Central Hobbies has them too.
Or buy them from me...
http://hem.passagen.se/airracing
The tank in the GEE BEE R-2 is a 450cc helitank.
Regards!
Jan K
Sweden