Hi Stein
Hi Have used a dyesub printer i have a little Canon Selphey portable printer that has paper and wax for printing which is water proof then i use 3M double sided tape on the back.
It works out more expensive than an ink jet photo print however it is water proof if you do not need the water proof you could just use an inkjet and photo paper.
this is the link for a printer
https://www.amazon.co.uk/Canon-SELPH...M5E02PA9B3XFHE
this is link for paper and ink
https://www.amazon.co.uk/Canon-KP-10.../dp/B001BJKO3M
Just remember if you go down this route fit as many decals on the page as possible each time you print due to the way the wax and paper works you are not saving any costs buy not filling the page unlike with an inkjet you use less ink.
hope this is of help and thanks for your kind comment.