I just checked the Universal Remote database, and the Magnum Dynalab code set is there. That means you can have an MX remote programmed to include your tuner’s operating controls, along with any TV & sound system you have. The MX-790 is $349.00 and a basic program is usually under $200.00. Not worth it just for the tuner, but as a total solution maybe. Alternatively a cheap code programmable one from a blister pack might have it for $10.00. The GE or Phillips ones use the UEI database, which is vast. They are annoying to set up, but hey, they’re cheap.
Give your back a break and get a good Class D, Purifi Eigentakt or GAN FET amp, which will be as transparent and powerful as you need without the hernia. NAD M23, or for more esoteric appeal, Orchard or Mytek. All under $4000.00, some a lot under.