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S197 3V Help finding brake booster?

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I got my 2006 GT out to the track yesterday for the first time since getting a cage installed. Unfortunately my brake booster died within the first three laps of the day! (I managed to salvage something out of the day by bumming a drive behind the wheel of a ZR1 and a well-modded C6 for a couple of sessions.)

It seems that there are no OEM or aftermarket units readily available ( won't even display the part!). Given that I've installed the Essex BBK, maybe it's time to try a GT500 booster instead? Not that they're any more readily available, but if I have to wait for parts…

Anyone aware of anyone with any brake booster (OEM, aftermarket, or GT500) in stock?

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