Years ago, 80's, HD rain suits were made so that I could wear a large and it was plenty long enough. Not so nowadays. I'm 6'2" 190 with 35" sleeves and 34" inseams. Does anybody know a brand of raingear that'll fit? I tried on all the HD stuff. Frogg Toggs looks great but I'd need XXlg to get the right length and then I'd be a flying sail.
You might try hunting gear as a last resort. It's most likely gonna be camo but Cabalas and those type guys have a huge selection of style and size. Good luck.
I recently got a set of Dri Ducks. They fit pretty well. I haven't gotten to test them yet. The old saying is true: Get rain gear and you'll never get rained on again.