FWIW, I'm 6'2" and I'm having the standard Suzuki windshield installed tomorrow on my '04 Intruder VS 800. Even though I'm a little shorter than you are, I can give you my impressions of the Suzuki windshield tomorrow night. I'll give you the size of the windshield in inches and tell you how much wind it blocks. Maybe that will help.
Check the internet. One manufacturer had three sizes (17", 19", and 21"?). I would guess about 10 companies make windshields for the Marauder. Finding a company probably won't be a problem. The problem may be finding out which one has the best quality. I'm sure some more experienced people here can help with that.