I need a chain tension bolt for a first gen SunTour Cyclone GT derailleur. This guy (I'm pretty sure it's the same between Cyclone and Cyclone GT):

I figured I'd see if I could figure out what other derailleurs might share that bolt with the early Cyclone units. Unfortunately, the only parts diagrams/parts lists I could find were in this SunTour Small Parts document on Disraeli Gears. It dates from 1983 or thereabouts, so the Cyclone series it shows is the Mk II. Though not identical, I think perhaps the bolt from the Vx shown in that document might work as a substitute. If I'm going to sacrifice a functioning derailleur to get a small part, I'd rather sacrifice one that's somewhat less desirable. Anybody got a Vx and an early Cyclone who can compare the two versions of this bolt? Any earlier Cyclone exploded parts diagrams I've not discovered out there? How about a mangled early Cyclone they'd be willing to part with?