wtd: brake booster for cantis for 100 mm spaced bosses

[ultrazenith]

I'm in the market for a brake booster to beef up my cantilevers on a flexy frame. The only catch is the bosses are 100 mm apart, instead of the more standard 80mm. Most boosters do seem to allow for a range of boss distances, though.

What you got?

preferred colour: purple or titanium.