The adaptor with the Feathertouch probably puts it at the correct distance but cost is prohibitive. Standard Crayford from Bintel was my first thought but I think smallest is 86mm and you needed 81mm (3 3/16”) from an earlier thread I read, perhaps confirm this. Note the screws holding the focuser will have to line up in spacing and thread size/pitch. New focuser may not come with screws expecting old ones to fit, not sure.
If you have no luck in AU then try OS at
http://www.scopestuff.com/ss_frc2.htm
I think it’s the same selection of sizes though but they may have some custom adaptors.