I'm looking to build a small system that consists of 8-10 small identical boards. Boards will be 4"-square (at most), and need to be spaced 1.5-2" on-center. There are less than a half-dozen signals (including power and GND) that need to be bussed across all boards, and each board needs to have about 3 dedicated connections (that only go to that board). No board connection will carry more than an amp. The power/GND busses need to carry up to 8 amps or so.
Designing and fabricating my own backplane will be pretty expensive (since it needs to be 12-20" long and at least 4" wide). I'm wondering if there's any sort of "generic" backplane/backplane-connector system that is available for a need such as this ?