Wine and beer bottles are easy to find around here if you just have the up-front attitude to go and ask for them. We have what are called MET recycling centers here at old empty lots or backlots of larger businesses. In the last few days I have been going to these places around south Tulsa here and just asking to take some of the bottles. The guys working there just asked a few questions about what I was doing with them and then when they watched me picking through the bottles they realized I was on the "up and up" and doing what I said I was and not going to use them to just break around town. I got 5 big 1 gallon wine jugs, about 60 returnable bottles in green and amber colors, a whole 9 bottle case of some olive green wine bottles, and a really nice cobalt blue wine bottle. That is only in a couple of days of looking and only at one particular center.
I have also noticed a great place to get various bottles from regular returns up to Grolsch and Carboy bottles. Go to your local antique mall where they have multiple vendors in one large space. Most people stick the old glass out just for show but also have good low prices on them too. Got a perfectly good 5 gallon carboy($9) and several perfectly working Grolsch bottles($.90 each) this way as well, again just at one store so far. Also leave the owner/proprietor your name an number and tell them what you are looking for. Most of the people that sell at these places are out shopping for more stuff to sell anyway and the more eyes you have out there looking for you the better you will come out. Plus they like to have buyers waiting to purchase stuff like this, all they have to do is bring it in and collect the cash.