If you get wire cutters you can cut a square from the wire section and use one of these
https://www.amazon.co.uk/Ferplast-Fp...dp/B001N03RRY/ Ferplast tubes can be expensive but you can get a set of them in Pets at Home for £8.50
http://www.petsathome.com/shop/en/pe...nimal-tube-set
The reason he's climbing so much could be that he doesn't have enough space so you might find that once he's settled in his bin cage he'll stop (some hamsters just love to climb though).