Just picked up a 3570.50/861
lookimg to replace the hands with original oem tritium. How difficult is it to source these hands? Really do like the patina tritium has over time. Thanks

 

Hi,
Finding the oem part will be OK, try ofrei, and others... but to find it new, with patina is near impossible.(took me 2 years for my transitional speedy)
You had to read some threads over staining or cooking techniques to make it match your dial.
I think Rolex guys are the best to found how to change colors for dials and hands since spiders and tropical dials increase the price of their watch.

 

all of those places seem to have just supermuninova replacements

 

you are right even Omega doesn't have them anymore, one source could be the people who sells their oem hands after being in Bienne.