I cant edit my previous message, i found this post
http://www.saxperience.com/forum/sho...d.php?t=396380
it is a Markt 2 and i have a Mark 1. the sizes he used are 95mm and 105mm but i cant find any on aliexpress. i odnt know if the mark 1 uses the same sizes. but according yo his ebay link 95 and 105mm are most common