Thanks everyone for your replies. I really appreciate it

I've tried the drawing on my skin along with using the elastic band technique. That helped for minor urges, but not extreme ones.

Part of the problem for me is that it's not just the immediate release of SI, it's also the distracting pain from ,and tending to, the wounds in the following days. That's part of the ritual for me.

I can't think of anything to replicate that.