I think a lot of the brands seem to have the Vitamin K too. While I was waiting for my Algaecal refill I bought some Garden of Life. It's not as easy on the stomach and does have Vitamin K. But Garden of Life may have a few different kinds within its brand. This one is called Vitamin Code Raw Calcium, it has the K.

I just did a google search, Coral Calcium without Vitamin and it did seem to have a lot of results.

Good luck