My big Dumeril's girl just got her display tank all assembled and looking great!

It's a 4' x 2' x 18" black PVC enclosure with LED light stripe and sliding glass doors. I'm excited to have a display tank (my one and only!) But I'm having a hard time figuring out how to spruce it up.

My Dumeril is so big that none of the "naturalistic" commercial hides are working out for her anymore. She does use the XL Exo-Terra hide, but whenever she goes in it it lifts up about 2" off the ground, like a turtle shell! Which is fine, she likes it so I'm probably going to leave it in there until she gets a bit bigger.

Other than that, I have a plastic dishwashing basin in there (white) that I soldered a big hole in, haha. It's functional, but also very UGLY.

I'm really wanting to go with something naturalistic for this display. No plastic tubs like kitty litter pans, no cardboard boxes, etc. I want them to be pretty!!!

Ideally, I want some nice big hides that have a pebble mosaic sort of thing on them. Like this, but on a hide:





I know I probably won't find exactly what I want commercially, so is there anybody out there who either knows how I would do this? Is there a way to get clay & fire it, but also waterproof it to make it safe to bleach & easy to clean?

If it is going to be too complicated to make my own, is there a source for commercially available hides that are big enough for boas?

What do you all use??