I think that Andy brought up a good point about using standard chain attachments with links mounted to them. I have been thinking about doing this for a little while, but haven't found the time. Maybe you can puts this to good use before I can.
Connecting links with mounting flanges can be found at McMaster on the last page of roller chain.
If you can get something similar to the part shown in the attached pic stamped out of plate to hold the rollers, I think that it will work when mounted to the chain. By properly sizing these parts, you may be able to make the chain lock in one direction giving the omnitrack rigidity between support rollers, but the ability to collapse around drive sprockets.
This is of course just concept, and needs tweaking.
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Jevawn Roberts
Georgia Tech Mechanical Engineering Senior
Co-Leader - GT FIRST
gtfirst@robojackets.org
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