I'm going to need a pair of new SRAM XO rear mech jockey wheels for winter, I've tracked down spares on Chainreaction but have gulped at the price. Are there any other good aftermarket ones that people would recommend?

BBB and KCNC do after market ones

and i THINK shimano ones will fit the bottom pulley

I bought some carbon ones off flea bay just to be bling but they are lasting really well.

I got some lightweight carbon ones off a Hong Kong ebay seller and they lasted about 5 months (was through the winter filth tho) since then bought some KCNC ones and they have performed excellently, the alloy shows no sign of wear (after 6 months) and its easy to clean the bearings if you notice them becoming gritty.

I stumped up for the KCNC ones and have been very happy, lasting much better than the OEM ones and they look bling 😆