So I've got a new shock to go on my Gemini, but the width of the bushes in the eyelets is greater than the existing Fox unit that's coming off, so I need new spacers (is that what you call them?) for the axle. Maybe I'm being daft but where can I get hold of some (I need 2 x 5mm for each end of the shock)? Are they just spacers - i.e. will anything of the correct diameter do?