Jetsons, check my 1655 (link in my signature), the GMT hand there is a 1570 caliber Rolex rep hand from classicwatchparts.com.
You need to trim the GMT hand a bit more flat with a file in height 0.5 mm or so (carefully), otherwise it will knock into the hour hand
It's a bit tight squeeze, but it will fit
I haven't yet tried it with a modern explorer, since I'd like to keep that stack correct
EDIT: No other 1570 hands, like hour, min, sec will fit the 2893-2. I tried expanding the hour/min 1570 hands to fit the 2893-2 but
they both broke (hand tube loosened), well that's life