Just a heads up for any UK bassists after quality amp covers. http://www.roqsolid.co.uk/phpNuke/index.php
These guys make really nice stuff - padded, robust material, first class construction. The covers look as if they will last for years. And they will make any cover you want to your dimensions/specifications.
I ordered one for my Markbass CMD102P combo (unusual shape, that) and when the cover came it was exactly what I was after and fitted like the proverbial glove. I immediately ordered another one for my 15" extension cab. There was a slight hiccup getting this one as the company were having email problems, but a couple of phone calls soon sorted the situation out and when the second cover arrived today I was equally happy with it. Definitely recommended.
I have no connection with the company other than as a very satisfied custiomer.