I need some help here. Looks like I didn't put enough thought into equipment purchasing, and that combined with a smaller space than expected requires that I find some way to mount something to a wall that isn't intended to mount to a wall.

I'm working with a telephone closet that's not deep at all (maybe a foot at most), but I have plenty of surface area to work with. I'm trying to find some way to attach to this surface a Cisco 2921 Integrated Services Router.

Cisco is no help to me (I was on the phone for an hour this morning getting bounced around to at least 8 different people). I totally understand that this device was not meant to be attached to a wall, and that's my fault. I'm just trying to figure out if there's any way to do it. Hell, I'm fine with setting it on its side on a ledge of some sort if that's what has to be done. I just need to get it figured out and soon.

I won't be doing the physical installation, so it doesn't have to be something that I'm capable of doing

Any ideas?