Dana 27a ring and pinion

[Lucasday]

Looking to see if any other ring and pinion from a Dana 30 or 25 would fit into a 27a? Looking on rock auto for it and no luck. Check other years of jeeps and only come up with stuff for a 30 or 44. I have a 1971 CJ5 225 oddfire, 27a , 44 off center rear. If anyone knows a gear set that would work I would be thankful. Reason for changing out is I have 4.88s in it now on 31/10.5/15s not much top end. Looking to go to go to a smaller 235/75/15. Thanks for any input. Looking to go down to a 3.73.""""
Never mind, found what I was looking for on another site. Thanks