Most of the typical MIK and MIC guitar stock out there uses the fairly standard 1 5/8 or 1 11/16 inch string spacing.
Epiphone makes a les paul "reissue" goldtop with P-90s that, I believe, has a slightly wider neck than their standard Les Pauls, but it's deeper, too. Kind of a bat. If you dig that (I do), you could check one of those out. I'm not sure how cheap they are, though.
I'm with you. I like a wide neck on guitars and basses, but you have to do a lot of searching.