A good upland vest or jacket is just what you need. Do a search on Ebay under name brands like Filson, Columbia or others. When you do a search look up in Completed Auctions this will give you an idea what they are going for and how much you should bid. I picked up a Columbia Strap bird vest for around $20.00 it was brand new. I have also gotten a Columbia Ptarmigan Parka and Goretex
bird hunting pants for around 50% of the normal Retail.