RLTAZH2.
That's actually a fun project, and certainly unique. I bought one of them H2 RC from Computer Geeks some time back for around $50, and it got "lost" somewhere, but it was fun, though the sound (both engine & horn) sound like a semi
I just ended up picking up a replacement from ebay, there's this guy listing them for $.01 but with $48 in shipping, think he has black, red, and yellow. Can;t go wrong for $50.
Keep us posted how yours turn out.