One source for palladium alloyed white gold that I use is David H.
Fell in California. The URL is www.dhfco.com
The reason that I use this alloy is for its softer properties. I use
no heat processes to make my ring creations from aerospace titanium
inlaid with silver, gold, and platinum. The palladium alloy of white
gold is MUCH easier to mate with the titanium due to its more ductile
nature. My rings can be seen at the URL in my signature,
Daniel J. Statman, Statman Designs