RCM motor heat sinks

Mike i am about to put another order in with you but have a question on you motor heatsinks.

I'll be putting them on both my Medusa 36-60 motors . Your S size heat sinks are showing that they work up to L size so they will fit the 60mm Medusa , is this correct or should i order the L size.

Also when will you have more stock of the CC Sidewinder .
Being in Australia i want to order everything together since postage is so high.

Cheers