This is my boy Kashmir. He's super sweet and quite affectionate. I'm not too sure what breed of rabbit he is, does anyone have any ideas based on appearance? He's only 3 lbs and is relatively small, but definitely larger than a dwarf.
Just look up wire shelving cubes on Google and you'll see what I'm talking about. Bed Bath & Beyond usually has them for $20 a pack and then if you use the $5 off coupon that you get in the mail or via email then you only pay fifteen a pack.
They usually come with little circular connectors but...
My suggestion would be to use Nic cubes on the inside and then reinforce it with wood so that even if your bunny did nibble a little bit it would still be okay. That's what I did for my bunny Kashmir.
My NIC see cubes were zip tied together and then attached to the wood afterwards