Tazz,
I bought a good sized wicker tunnel (organic of course) for my guys. Actually I bought 3 of them, they are sturdy but not quite as long as I had envisioned but the buns do love to run through them...I'll have to go take a look on the web but I think it was probably from bunnybytes. All threetunnels are over a year old and are still in reasonable shape although the buns have chewed on them, which is the idea after all.........Chocolate even put a window in hers!!!! Smart girl!!!