Clear base for hamster heaven cage?

[Osboz]

I have a Syrian hamster in a hamster heaven (plus another smaller cage connected by tubes) but I'm wondering if it's possible to replace the base of the cage with a clear one. I have another hamster (dwarf) in a cage with a clear base and it's great to be able to see her digging about, so I'd love to be able to do the same with my Syrian.

Does anyone know if there's anything I could use, either a proper base or something that would serve the same purpose? I'm happy to do a bit of DIY if necessary.

I'm in the UK if it makes a difference.