Regarding the reproducer and tone-arm for a Reginaphone, try contacting
Wyatt's Musical Americana (707)263-5013 M-T 10-4 PST.  He has most parts
for Columbia, Victor, Edison, etc., and if he doesn't have the parts, he
can machine them on premises.  I have used them for some rare Berliner
parts and have been very pleased with their service.

Scott Currier
http://www.currierandives.com