http://www.krebsmicro.com/Nikon_CF.pdf
The only ones I would look for myself would be the Plan Apos or Plan Achromats shown at the top of page 11, with some additional specs on page 14. (Also the three CF/CFN Plan DIC objectives). This is primarily because there is not a great deal of info on which were considered compatible with super wide-field viewing (or as Nikon calls it "ultrawide-field"). Some others, and earlier versions of Nikon CF biological objectives may be OK in this regard as well, but I just don't have that information. (If anyone has more info on these or previous versions of Nikon CF biological objectives it would be nice to find out). Fortunately these are still pretty common on the used market.
Don't forget... there are many trinocular heads from the finite objective days (probably the majority) where it will not be possible to place a DSLR camera close enough to achieve focus in the camera at the same time as the viewing eyepieces (in a direct projection arrangement). Often this is because of the large lens-mount to sensor distance, usually somewhere in the range of 44-46mm. There a quite a few non-SLR cameras available that have much less body depth. Sometimes they will work where a DSLR is too "thick". You would probably want to figure out this aspect to see what is possible before getting too serious about tracking down objectives.
FWIW... Olympus and Zeiss have been very good providing this particular specification on their new infinity objectives. Olympus even puts it directly on the objectives as a field number (FN). Here, for example, is a small section of an Olympus brochure:
