I have a leak in the evaporator coil of my HVAC unit. Are there any coils (and regulators) on the market that are compatible with both R-22 and R-410? I canít afford to switch out the AC unit now. But expect it to go bad in a few years. One tech. recommended a coil that is compatible with both gases, another said that wasnít possible and a third just didnít know about that. [Before Irishmist gets started, I have consulted with licensed (as in professional), certified, full-time HVAC contractors (3 to be exact) and I am getting slightly different stories from each. I am looking here for additional information and educated assumptions. Not iron-clad answers.]