Great.
As for shelving, yes, it`s not an issue. You could make a shelf either from using a spare Ferplast mini Duna cage plastic shelf and lodging it into the same central gaps between the top and the base of your new cage and put a cardboard shoe box under the other end as a sleeping house. Nice and roomy, no floor in it and free from any show shop!
Run one of these Trixie log bendy bridges up each end and there you go! This is how my shelf is and even though it sags a bit, Chubs doesn`t bother with the details of his interior!!!
Or indeed, you could find a piece of plywood from a DIY store or somewhere that uses it and a thin off-cut could be used and wooden stumps nailed onto each corner from wooden pegs or anything you feel will be good to use as legs. The shelf should only be around five inches off the cage floor for safety reasons. Or just a little higher than an up-turned shoe box to fit underneath.
How is wee Buddy doing now? I`m sure she will settle into her new cage well and rummage around for ages, which might take her mind off what`s happened to her. Hamsters are hardy little creatures. x