GPG disappeared, even some on FALfiles don't know where he went, I'll have to check back and see if someone has chimed in with where he went... I'd much rather have a century frankenfal than a new DSA, more old milsurp parts in them. The DSA reciever might be leaps and bounds ahead of a century one, but the rest of the gun is a step back from the milsurp parts on the century guns.
You can put a folding charging handle on it. You can either cut the handle or the reciever to make it latch in the forward position, I'd cut the charging handle because it's the cheaper part, even if that isn't how it was done on the originals.
You can get a new lower for $50 or so if you look around. I looked at para stocks for a while, but eventually figured it wasn't worth the extra expense. $400 is a lot of ammo!
ETA:The recoil spring tubes can be very hard to get off, expect to wreck the old one getting it off of the lower.