...will need actual model number to confirm but I doubt there is one that works. Just tune in the station and it will switch. If you are only using channel 3, tune to it as a discrete work around.

Also... a discrete code in what format? For what control system? details.....

For the second post... do a simple forum search for "sharp codes" on this site. I posted a full set of sharp codes. Some may not work for your model.