shannonjpower
I don't think you can readily purchase 1.8mm thermal pads so it's most likely 1.5mm for the inductors/chokes and 2mm for the backplate.
The guy measured them though. However the 1.8mm ones he has could
have been squashed a little by mail.
It will be fine if you get 2mm ones. You can stretch them a little, + they get flattened by pressure.
Heck you could even measure the gap yourselves.