I have had good luck with this company http://www.prescriptiondivemasks.com/ My mask has both far prescription and bifocal for close up work. They can put the bifocal almost anywhere you want it. I had mine moved up more than normal which I find better for camera work. You can send them your mask or buy one of theirs and have your exact prescription put in it. I would suggest you find a mask and try it on before buying one. There are a lot of mask that will not fit my face and you may have the same problem. Getting my own mask at the LSD (or ordering a new one just like the one you have off line) and shipping it to these guy was the the best solution I found. I got a mask that fit and the lenses right the first time.