I know Burton makes their cargo snowboarding pants in a short. You may want to check them out. I guess it really depends on your waist size though since they are usually about 2 in shorter on the inseam compared to the regular length.
Cargo Snowboard Pant - Short | Burton Snowboards
You could also look into some of the non-snowboard specific outdoor companies like Arcteryx, Patagonia, and Mountain Hardwear that also sell snow pants in a short length.
Arcteryx Sabre Pant | Arcteryx for sale at US Outdoor Store
Patagonia Men's Snowshot Pants - Short for Skiing and Snowboarding