Although prdisplays1 is very backlogged and it might therefore take a while before you have your boxes, I can definitely recommend them from my experience with them a few years back.
When I bought my acrylic box for my Japanese Sky Legends booster box a few years ago, I could give him the depth, width, and height and he’d made the acrylic box that fits that size. I did include a few mm on each dimension personally just in case, but it fits very nicely imo and it’s of high quality. Also wasn’t too expensive. I’m not sure what his current prices are, but iirc I paid 15 GBP for the box and an additional 16 GBP for shipping from the UK to The Netherlands (this was before the Brexit where GBP was worth a bit more than now tbf).
Here is a picture of my box in its acrylic case:
Greetz,
Quuador