There was a post on one of the Ranger V8 swap forums where the OP wrote that he'd found a guy on-line that performed a PATS delete through the mail.
He sent his PCM and $200 to the guy, a couple days later, he got the PCM back ready to go.
Some searching through the handfull of conversion sites might find the original post and get you some ID on who to ask.
As mentioned, it might be easier to wire in a PATS module and transceiver, find a used key and use FOESCAN to get your PCM to recognise the key.
No reason to change the locks, simply use a nylon zip tie to tie the key to the transceiver and tuck both the module and transceiver somewhere out of the way under the dask.