Outdoor housing big enough for DSLR?

Can anybody recommend an outdoor camera housing big enough to hold a DSLR (or something like a Canon G1X)?

All the standard CCTV housings I can find have at most about 4″ of width inside – I need at least 5″.

Doesn’t need to be fancy – just something to keep out the snow and rain.

(reasonably priced would be nice)