What I did is sent this file I made to some of the ebay sticker sellers for a quote. Most answered they can do no problem. Ask to make it white and reversed so that it can be affixed on the inside. It cost me something like 2€ each :smile:
Actually, the guy I ordered from is now selling them on ebay (should ask for royalties :smile: ) but price has now doubled!
https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=173544687733&_sacat=0