Custom enclosure?

I’ve been looking at enclosure options. I live in the UK and I’m not skilled with DIY, but hamster-homes has an option to extend the cage by 30cm, essentially giving up to 68cm height for deep burrows.

This is fantastic, but I was wondering if there were any other custom enclosure makers that would go even deeper than that? Hamster burrows fascinate me and I want to see the little system my hamster makes, plus give them the opportunity to burrow more for their own wellbeing. If anyone has any ideas, thank you!