Hi, did you get Scor-Pal? I'm the one who didn't have it but just saw a post today
Forums at Splitcoaststampers In case that you are still looking for one, check it out.
For me, a friend bought me Martha S. scoring board. The dimension is pretty much alike but more grooves on the board. I haven't really tried but it looks really good.
Good luck, Jam in Japan