Endicot

Is the Pi Hut your distributor for Canada too? I

Love the case. My question is swapping/replacing boards in the case. I have the 2nd gen case with a RPI Model 3B, I want to swap it out and with a Model 3B+. I hear the thermal pad will need to be replaced with a thinner pad. Where can I get thermal pads for both Model 3B or Model 3B+ (I live in Canada)? What should I be looking for? P.s. I not much of a hardware guy, so I don't have any experience with Thermal Paste/Grease. Is this a good alternative? Please advise.