Vacuum advance/retard dizzy..., I need to rebuild mine, wher to get parts? Options

[Brando]

I'm having trouble locating a rebuild kit for my stock 1.8 distributor. I don't have the money to upgrade to an optical setup, and I have a .009 on the shelf that's rebuilt (don't know what springs to use though). I was thinking it might be a better idea to rebuild my stock 1.8 dizzy than use the 009. Although, with the 009 I can replace the springs with something else to get a better advance curve (maybe?). Any way I can change the total advance on it? Messing with the stop plate comes to mind, but I don't want to destroy a good distributor to experiment.

Any spring reccommendations? the Grey/grey springs used in the mallory units, or are those a different size/length?

As for the stock unit I have, the vacuum pots are fuch't... I think I can get 'em from Porsche, but I've yet to check.