I would write to Hipshot directly. They are very helpful. I received a bridge with the wrong size hex key and I wrote to them stating that I think I damaged one or two of the adjustment screws and which size should it be and they sent me out the correct key and a full set of spare hex bolts to Australia. If their customer service is that good I am sure they can tell you the bridge spacing of one of their products. The guy who helped me was Zack Singer.
zack AT hipshotproducts.com
(replace the AT with @ and remove the spaces)