There are a couple of options, I had the same problem with not having the braze-ons for bottle cages. I found Schwinn made a plastic one that clips to small diameter tubes. I forget where I found it. I have seen bottle holders that attach to the rear stays of your saddle, to conveniently carry two bottles. And a final option that I've seen used by some is to just get a regular bottle cage and use those clamps that have a screw to tighten, like you use on water tubes in your car, to hold the cage on the bike tubes. Not great on the paint job but effective.