I'm doing the same thing. Except my first glock was the first gun I ever bought and its a gen 1 glock 19...
Good luck to you though!
P.s. if you know anyone that has a gen 1 I'd love to contact them.
Wtb: the first gun I ever bought, again. Gen 1 Glock 19 with a nick under the recoil spring on the receiver where I dropped it.