I believe the microSW-X comes in two versions, the 40mm long and the 60mm long.

If i am correct, the widht does not exceeed 15-16mm, so the short version and a custom cut copper plate might do the job...if the space between the caps exceeds 60mm, it might be a tight fit for the long version also...

Contact Watercool, to give you exact dimensions and maybe a 1:1 drawing like the other ones they have in their download page. Print, cut and do some test fitting...

One more thing, the copper plates come in two versions one 80x30mm with 2 mounting threads for the 40mm version and one 100x40mm for the 60mm version...it seems that the hole distance on the PCB might be covered only by the 100x30mm plate...