For just 1 spacer I’d have said build one with coins, but that doesn’t make sense for 10. I’d inquire with our user “kiriba-ru” and see what he has left in stock. 10 might be enough for a small run, but please don’t take my word for it.
These things do take effort to produce in the quality we get, and the folks on here make very good stuff. I have the kiriba-ru spacer via a friend and it is amazing.
@aurum, one thing you could do instead is to buy a Jaxman E2L instead. It has a thick shelf(4mm), and a better thermal path than the Convoy S2+, and supports triple setups stock.