I apologize, but I do understand your frustration. I too am finding similar discrepancies. None of these parts have listed operating frequencies.
- Ford parts offers only the bolt on sensor #TPMS33. (blue) This has part number stamped 5L1T-1A150-AC and listed as 5L1Z-1A150-AB
- Tasca Parts offers TPMPS #1,2(same p/n as TPMS33) ,42,47,60
- Rockauto offers a handful of bolt-on 315MHZ sensors, included a blue Motorcraft Sensor TPMS33
- This Ford TPMS Job Aid Says 2003-04 uses a blue Bolt on TPMS sensor and 2005 is a black one. I am not sure the difference between the two and if the conversion was done after 2004 or mid 2005. The job aid does not go into that kind of detail.
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- Dorman Products offers part 974-017 which is equivalent to 5L1Z-1A150-AA. Dorman indicates that is this is a 315MHz sensor
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- Dorman also offers part 974-302 which is a 433 MHz sensor.
I think your best best may be to find friendly tire shop. See if they can pop the bead on a tire so you can pull the part number of an existing one.
I couldn't begin to guess if they both are 315 MHz or are rated for different nominal pressures. I'll do some more research and get back.