TakeiT, you might want to give some thought to making your own exhaust system. You can use 1/2" or better yet, 3/4" EMT, electrical conduit. It can bent with the proper tool and you can get some pretty tight radius bends. Tight enough for our purposes anyway.
If you have a welder or access to someone who does, building a custom exhaust can be a challenge but fun. It takes a little practice but EMT is cheap if you mess up a few feet of it. Give it a try.
Tom