I'm not familiar with Greater Status (what level, duration, range, effect?) but for the spell Status, I think I'd start by looking at the generic item creation formula for a continuous effect (spellLevel_2 x casterLevel_3 x 2000gp) = 12000gp. I think that would get you two rings: one master, and one other (that can be "read" by the wearer of the master ring). Increase the casterLevel to 6 (=24000gp) and that gets you three rings (one master and two others), and so on. You might need to increase the total cost a bit (say x1.5) if you want all the rings to be able to "read" each other (ie, they're all masters).
Since there's no range limit on the spell (except "on the same plane of existence"), I don't think the rings would have a limit, either.
For the spell Greater Status, I presume you'd just plug in the appropriate spellLevel and casterLevel (plus 50x the cost of any expensive material components), and do the same calculation as above.
That's a start, anyway. If you've got a bit more info, maybe we can get a more precise number. Or maybe someon knows of an item that already does something similar..?