I was looking a little while back and never found anything in the way of dimensions. Looks from the picture you posted like you've already been to
www.hardmvs.com.
Jakobud has the dimensions of the MVS 4-25 (Version 3) at
www.jakobud.com. It looks very similar except for the taller marquee and the coin-door jutting out, so you could just make the necceassary changes?
If you do turn up any dimensions for the 1-25 or 2-25 I'd love a copy. And it would be great if you could pass them on to Jakobud.
I hope you have more luck than I did!