Sorry Wayne, that request is simply not a reasonable expectation in this electronic day and age, proprietary knowledge and all. Rev doesn't share their dimensions publicly. If you want to know exactly what size one is, then you need to borrow or acquire it
I suspect Waynes intention is to take the guesswork out of the equasion for would-be buyers, not copyright infringement. One could argue that it is similarly unreasonable to expect a buyer (especially ones in other countries or no access to someone with the various options) to shell out the $$$ on a guess and hope they got it right.
We've all seen that the knockoff companies and those who make something for personal use have had no problem at all getting the specifics (right down to signature copies) so I doubt a partial photo showing how the viarious block sizes relate to each other would make any difference at all.
Not my business, not my call, but I think that the request is valid and, done correctly, such an image can assist potential buyers without assisting would be copy cats (who already make the mesh).
My $0.02 ... YMMV