Shims are not really a stock item. Who made the thing you're trying to shim? Do they have spares? How critical are the dimensions? You can get 0.6mm aluminium shims for chainring spacing, would one of those do? This tube is enough for about 100 off if parting off on a lathe, or you could get somebody with a laser to cut them from sheet.
Shims are not really a stock item. Who made the thing you're trying to shim? Do they have spares? How critical are the dimensions? You can get 0.6mm aluminium shims for chainring spacing, would one of those do? This tube is enough for about 100 off if parting off on a lathe, or you could get somebody with a laser to cut them from sheet.