Hello, I made really simple case for cheap but funcional wireless charger from Aliexpress (https://www.aliexpress.com/item/1005003407322671.html?spm=a2g0o.order_list.order_list_main.23.237e1802PVCtWM) 15W with USB C.
Case is made from two pieces which had to be glue together. Also on part 1 should be glued the coil and the board - there is small pin for that, just make USB port parallel to edge of case.

You can use any material, print is supportless.