There's an ebay store "heavystar" who has them new $38. US for 3, they are Copal 0 but it's simple to file them out to take a larger size.

I can recommend the seller as I've bought & been using his boards on my own Crown Graphic, and I know quite a few others here or on the LFP forum have also bought from him.

As these are under $13 each new it's pointless buying second-hand

Ian