Absolutely untrue. Everything is still up and working, you're correct it's no longer maintained as Johnny is unavailable for whichever reason, however we advise everyone of this upon purchasing via GP and all members of Staff have our names as Unmaintained AND there's even an announcement about...
Cuell Plugins has a ported plugin from xKylee on OPRS but you need access to a client such as Ganom's, RLPL, buy Cuell's plugins per month or another client which allows you to sideload Runelite plugins.
Hydra also have it included in their Essentials Package as well.