budsgunshop.com has good prices, dunno if they have any LTR's,
peruse gunbroker, arfcom, etc. and look for a deal. Get it shipped to an FFL and pay your transfer fee. Larry at LA Gun and Reloading on Siegen in Baton Rouge is great to work with for those kinda things.
For parts check: http://www.brownells.com/
Order their catalog. Its a great parts reference. 500+ pages, well worth the 5 bucks. You get your money back with your first order.