If you don't care about lcd icons (you can use self-printed ones anyway on transparent caps), there are loads of cheap programmable keypads on AliExpress, some

If you don't care about lcd icons (you can use self-printed ones anyway on transparent caps), there are loads of cheap programmable keypads on AliExpress, some with knobs, some with bluetooth, most with color lcd. The configuration software is not great, but in most cases you'll only have to suffer through that only once or twice. All for a very small fraction of ElGatos.