My problem is the wireless switches have to be within 1 foot of the
transceivers to work even after changing the battries
so I tried using a PHR03 (hand held remote) and works ok but only when
the two 60 amp circuit breakers for the A/C units are in the off position.
So the XPFM's are before the breakers? Or did you try them in another 220V line (perhaps less noisy for the PAT01)
Also, the XPCR should take care of this, but do you have a PAT01 on each phase of the 220V line?
You are describing two seperate problems. A PLC problem and a poor RF problem from the SS13A's.
The SS13A are notorious for short range. I have used a "passive repeater" (search this forum, it is a simple 18 inch wire or rod placed next to the SS13A to act as a better antenna) with some improvement.
Also the CR2032s that come with the SS13A from old X10 were themselves very old or low quality. If "new X10" is once again making SS13As, the batteries may be fresh, but I always replace with new 2032's (I know you said you changed batteries but are you sure of the replacements you used?).