GMK hyperfuse has adapters
also mind that you can use numpad's keycaps like 3, 6 and 9 for use with rightmost column.
maybe jtk 1 also has ones i don't remember, at least jtk2 has the adapters.
the projected gmk classic beige also was supposed to have adapters.
also mind that doing this config: pgup,pgdn,end,delete looks pretty ok. You could also switch delete out for a fn key for better alignment.