That's an older Sears part number. Have you tried going through Sears Parts
directly? They're known to carry parts for obsolete items.
If your opener is 20+ years old and not one of the secure high frequency
types, you might want to replace the whole unit. A nice new opener is around
200 bucks and lots of folks get robbed each year due to kids and nerds
cracking old garage door opener freqs.
Sad thing is old Sears openers keep going and going and are about the best
ones ever made.
Post by Daphne + Dave139.18778 mhz Fits Sears 1/2hp Garage Door Opener. 3-button type or will
take anything that works. The Universals DONT work due to freq type.