Yup, there is a lot you can DIY when it comes to reptile hides and enclosures.
I have a super large BP in a Display cage. I wanted a big enough hide, but something that looked a bit "naturalistic". So I found this HUGE plastic flower pot at Lowes. I needed the big one, so that it was wide enough once I shortened it.
Cut it down about 5 inches then cut an opening in it, sanded down the sharp edges, put something on top, and presto !
Cat litter boxes also make great hides and can often be found at the dollar store. Diff. sizes, too.
Good for you, for coming up with a custom hide at a great price !