Has anyone found ceramic pads for the GXP yet?

Nope... I haven't been able to find much of anything aftermarket for the 04 GXP except a K&N drop in... even that you had to search for like engines and cross ref the part number. I think that because so few were made it may be a while before we can find after market performance parts... I'd like to find a tuner but I think that may never happen with the N*...