They have some really nice deals put together in this months SGN <$300 for a Mega lower, lower parts kit and an upper.

A buddy of mine swears by Sarco and gets all his MG goodies there. They have allot of good deals in their ads and online, especially with hard to find items.

I picked up a upper reciever and a barrel from them a few months ago, they were both ex-USGI and in good condition, as adverstised, etc... I would buy from them again if they had something I wanted.

have you tried e-gunparts.com ? Not sure if you can buy kits, but its another good place to get parts.

Tropic