Found these copper shims, almost perfect for our applications if you need to shim up your copper MCPCBS with another layer of copper. Relevant diameters are 20, 25, 30mm in .7 and 1mm thickness. They are under a $1 each although postage may kill it. Still beats cutting and filing which is tedious.
Supersports600 (Yass) is a great guy to deal with. I live near him so he let’s me pickup from his place and have a good old chat and he does good prices.
Wish I saw this sooner, just bought some 20mm square ones from Ebay. Bit cheaper, but like you said will require some filing to fit. Picked up 5 of the 0.5, 0.8, 1.0 and 1.2mm so I can do some work on focusing dedomes. $3.50 shipping is good, might pick up some 1mm spacers for the Yezl.
This Ebay seller seems to have 30mm for a decent enough price. I feel your pain, looked this up a while ago but I only have one 26650 that I want to take the protection off, so It was cheaper for me to buy an unprotected 26650. :~
Ohh you just missed the COTD $15 eneloops free shipping. These keep coming up and i keep thinking what I would use them for! I have a mouse and remote here and there but the cheapo bunnings batteries last me forever. Feel bad about the landfill though.