RD's where did you get your number stamps?

Want to have the professional look for our race. Where did you get or have your number stamps made and what ink did you use?

Thanks

At a race I volunteer at, we used to stamp the pro athletes. It turned out to be such an absolute pain in the ass that we switched to using temporary tattoos instead. That’s slightly less of a pain in the ass. So I’d be curious to know how the races that stamp do it. It takes so much time, but works for a race like Kona because they have so many volunteers!