Need respirator recommendations

After reading the responses, and doing some research, it looks like the only safe way to spray urethanes is to use a fresh air respirator. Does anyone have any suggestions? It looks like they are kind of pricey, but I’d consider it if that’s the way to go. The other option would be to avoid urethane paints and just stick with epoxy. Some years ago I belonged to an EAA chapter that bought an HVLP turbine system that had a fresh-air system built in. Several chapter members used it to paint their airplanes with urethane paint. I really wanted to stick with my regular compressor and HVLP gun if possible.