you mean the recaro srD, right?
according to the official recaro site: ( www.recaro.com: english version
), the adaptor parts # for recaro seats for the toyota celica '00 up is "86.65.16/26" whether this includes sliders (which you already have) i do not know...so it might not be worth it to buy, but its worth looking into.
i must have searched at least 15 minutes trying to find mounting hardware..but i couldn't. but you might want to call some autosport shops and ask them if they know what the part # is for just the mounts. if not, give them the parts # above and see if they can maybe do a special order for it.
sorry for not being of much help...but hopefully it helped at least a little.