Take a look at the DryDucks raingear. They tend to be large for their stated size and, they are inexpensive as well. The one I have has held up pretty well although they have a reputation for zipper failures and overall fragility. Not the best for bush whacking. I have one in Size L and it is roomy to say the least. I'm 5' 9" and 165 lb.
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May I walk in beauty.