I need a new insert for my RSM .416 Rigby. I would really like a large white bead if possible. If you could direct me I would appreciate it.
Frank

I believe that NECG makes a replacement. I don't have my catalog handy, but Brownells used to carry them...if not, you can order from NECG direct.

Midway has a better necg selection than brownells, dang the luck

Not to change the subject, but, I have a Griffin & Howe front sight and I need to replace the bead: the existing one is too small for me to pick up quickly. Is it doable to simply replace the bead? and who would be the best to do the work?

Here's a place to buy what you're looking for:

http://www.newenglandcustomgun.com/

Thank you for the information.
Necg had what I needed.
Frank