Is there anything else you can use instead of the official rockshox spacers? Will a plastic spacer of the same dimensions work or do they have a special clip or anything?

hi
yes you can use some think like nylon bar make sure its square if you are cutting it your self best still use a lathe what size you after?

I need 55mm of spacer, any idea what the dimensions are of the official ones?

I used a stack of these to lower my Lyric Solo air – works a treat and adjustable too.

http://cgi.ebay.co.uk/PLASTIC-WASHER-M10-NYLON-25-PIECES_W0QQitemZ300329042804QQcmdZViewItemQQptZUK_DIY_Material_Nails_Fixing_MJ?hash=item45ed018374

Do those washers fit snugly on the air shaft then with no rattles or anything?

Just to check before I buy, will these be ok to lower my air pikes with?