Multiple LVDS inputs from Multiple sources- without DPA support

Same clock frequency with 0PPM difference(i.e. they all originate from the same clock source) or same frequency, but they'll all vary over time because they come from different clock sources?

What size device/package are you looking at? Naturally you want to use the True LVDS on the rows, but if there's not enough, you could put some of the interfaces on the columns and use external resistors. For those you won't use DPA and instead would use regular source-synchronous, which I believe you should be able to do at those rates pretty easily. It will require a PLL per/interface for the source synchronous stuff.