I really have no idea. Old skool 2010 spesh xc. There’s a rubber/plastic cup type thing with a bearing race at the bottom of the forks, then another bearing race at the top then another cane creek plastic bit that sits over that. However it would appear the rubber bit has gone missing therefore leaving a gap exposing the race to all the elements. Just want a cheap replacement but really don’t know what to buy. Standard old school rockshox forks with straight steerer etc.

Have a try here

https://www.canecreek.com/headset-fit-finder

do you have the tools to whomp it out?

if so remove and measure the internal diameter top/bottom and go to the superstar website, select form the drop down menu.