I'm afraid I don't as it was back in the day, but consited of a stack of pallets, a couple of sleepers and about 3 concrete blocks.
You could kinda roll them with a little effort, but portability wasn't really built into my design. You could easily incorporate some kinda handle / maybe even a lightweight fill core (Kingspan maybe??) or design them so they can be split into 2 smaller parts.
You're right though, skys the limit when it comes to incorporating stuff into them