I get mine from Pegasus. They are local to me and have a decent selection.
www.pegasusautoracing.com
The 2 turns out your talking about is your idle jets. Has nothing to do with your mains. I would go with .50's on a stockish 1.8.
BTW I've gone more than 2 turns out but prefer it to be around 1.5 to 2. I never go over 3. I step up to the next size jet.
Better link-
http://www.pegasusautoracing.com/group.asp...upID=WEBERIDFPJ