I have a 20" offset smoker (see attached picture) that I built a few months ago, and I'm trying to locate a high quality grill cover for it. I would like to find something similar to the Brinkmann Smoke N Pit BBQ Grill Cover with the velvet interior lining, but this cover is too short (according to Brinkmann's specifications). My smoker is a total of 5' long (40" smoke chamber and 20" firebox) and of course 20" wide. I've also read some bad reviews regarding the Char-Broil Heavy Duty Smoker Cover. Thoughts?