Where is the best place to buy Control Line engines?
Or to get parts venturies / Needle valves to convert R/C engines?
The best places to buy CL engines:
CL Contests, (look for the guy with a card table selling off his stuff)
CL Club Meetings, (buy raffle tickets)
RC Club Meetings/Flying Fields (ask the oldest flyers what they have for sale/trade)
MECA Swap Meets, (GOLD MINE),
Etc.
The best places to buy CL Venturi's:
Lee Machine Shop (extensive offering)
Ebay (seller name shtterman, and others)
The best places to buy CL NVA's:
RSM Distribution (Eric Rule)
Precision Aero (Randy Smith)
Tower Hobbies (OS brand)
Guys who will make a Venturi, install it and test your engine:
Master Mechanic, CL Racer, and my buddy: Jed Kusik, 714-669-0205
TYME (test your model engines) Scott Riese, 503-246-4631
There's another guy too, he runs a forum, but not this one...
If you know what you need you can post a wanted ad and sometimes multiple people will fight over the opportunity to be that one guy that provides you with parts.
How's that for a start?