you should email someone like suzo/happ with the exact token size and whether it is magnetic,they will probably have a perfect match but even if its slightly out there a few adjustments you can make yourself on the mech
we have the plastic type from suzo(set on 1 euro) and i don't have any issues with these(perhaps the odd reject spring that breaks)
if you go to
www.suzo.co.uk and download the product catologue for coin validators goto page 73 and you will see the red plastic mechs we use
suzo will export and also offer bulk purchase discount