aftermarket DX coil needed

Does anyone have a reference for a good aftermarket coil that makes retrofit coils for existing air handlers? I know that there are plenty of them out there and we have used some with mixed results. We have a 12.5 R22 air handler that is either York, or Climate master (no nameplate) the coil has multiple leaks and the outdoor unit has one shorted compressor. The room was built around the air handler, so if a coil can be made to fit the AHU, that may be the better option, and then we would replace the outdoor unit. The is a straight cooling only air handler, no heat needed. Thanks to all