Did Remington ever make the 10mm in the Golden Saber load?  I always liked this load in .38/.357 and .45, and I always heard good things about the Golden Saber in forty.

No unfortunately not. But Doubletap used to load it:

http://www.gunsamerica.com/989521725/DoubleTap-10mm-165gr-Golden-Saber-JHP.htm

D/T 165 Golden Sabers were tested thru phone books at the following site. www.brasstard.com  Testing done thru Glock 20 Gen 3. This promted me to get the setup also described in article.

Yes it was nice to be able to get the Remington Golden Sabers in bulk to handload with, haven't seen any to be bought in quite some time.  Newer versions were said to be bonded.  I do like them with the bore riding nose and driving power band.