97 Prix Radio "LOC" is now "INOP"!!! HELP

[Dwilko]

Fixed an SES code for the M.A.P. sensor, and had the battery disconnected, which of course LOC-ed the radio with Theftloc. I forgot about Theftloc, and don't know the code (I think my son set it several years ago, oops). After 8 tries, "INOP".

I tried the previous post about hitting two presets to get a 6-digit code, then obtaining the factory 4-digit code to enter. But no go. I think mine is presets 1/4 (which I did try), but also no go. Basically, nothing seems to work now that I have INOP. Anyone know how to get past it without a dealer visit?