uncle uncle

So I have a run around bike that's nothing special... in fact, horror of all horrors, it's a hi-ten frame. I been thinking about playing around with the drivetrain, mostly pulling the Suntour derailleur off of it and keeping it as a spare. So, assuming I want to go new, but don't necessarily want a derailleur that looks like it's decades newer than the rest of the bike, anyone have any suggestions? I don't have a coop around me anymore to get vintage parts, our's never really had much, even when they were around. And no shop around here has take-offs or anything vintage, parts wise.