Wanted!! R53 standard pulley

[Kh22]

Hi, recently upgraded the pulley on my supercharger but have been having engine issues (didn't do any other upgrades) so want to put a standard one back on..
Does anyone have / or know of the best place to get a standard or 0% pulley.. or would anyone like my upgraded one in return for standard.. I think it's 11%
Thanks
Any info much appreciated!!!!