Who makes these plot sheets? They say "copyright 2004 Moonstone Systems Ltd. www.bluebarnacle.com", but that website is inactive (it's for sale), and googling "moonstone systems ltd." didn't show anything promising.
I'd love to see somebody setting themselves up to offer customized plotting sheets, or even better, to see somebody place into the public domain software to make customize plotting diagrams; I think it would be quite a useful niche to fill. There are always improvements to be made, and it would be nice to see people able to shorten the development cycle.