there are quite a bit of parts as imps were mass produced but they also havent been made for...8? years..or so.
impulse-owners website or the imp trading thread have parts used.
ebay compulsivepb and punisherspb usually seem to have some old new stuff for certain guns.
i dont know if gog would service them although you should be able to find someplace that will fairly easily. they are pretty much tanks and not hard to work on.
lamorte: "Hilltawk: puttin winders 7 in ma puter. addin lossa faster movin to it too and another movie drawr thangy. wanna git anothur pooter wif evin more faster movin stuff to it then this 1."
The Ripdisc Collection