need cross reference help

[Tim]

Is there anyway to cross a number that doesn't show up on the 'normal'
cross reference sites like NTE. I have an old Wurlitzer jukebox and
need to replace a 'Texas Instrument# wt36d3' It also has '7322'
printed on it but I think thats a date code. It also has '140770'
printed on it. It has 3 pins, mounts to a heatsink and looks like a
7805 vr.

Any help would be welcome

Thanks,
Tim