It's very doable, but we haven't done it yet (although some great community folks did an ONNX version of v21).

I haven't looked in depth, but it should be doable without modifications to llama.cpp. You can't just convert the LoRA, through - there's a whole pointer head and some custom layers that need to be correctly handled (in fact, the LoRA mostly exists to get the base model to behave the way the pointer head needs).