go with a pawn shop gun or a new one on sale you can always sell the take off parts..... by the time you go throught buying a receiver and trigger group and bolt you will come close to exceed the price of a new gun...... I have modified several 10/22 and using a complete gun is the easiest route to go visit
http://www.rimfirecentral.com/forums/ for everything you need to know
last Christmas present for brother in law built into a Mach 2 with a Green Mountain barrel and Hogue OverMold
my Boyds Evolution with a HM2 Green Mountain
Boyds Blaster with E.R. Shaw HM2