Re:
I've been looking at this as well, for another ss but for daughter on 1992 Orange prestige but think all said as far as Shimano, m732/m733 in XT range and MT-62/MT-63 in Deore DX type range difference in each being 4 vs 2 finger. What I have also done on one of my single speeds is M071 (DX), without the pod but leaving the hanger, its not obtrusive with ss and with gripshift there is nothing either. Same would apply to XT equivalent M091.
The good non shimano stuff seems bit rarer and pricier......