I wish I could find one like that. If you are worried about the bolt take it to a competent gunsmith (I know they are rare) and have it checked out. To be honest I'd be much more worried about the headspace than a weak bolt. These rifles are more than 100 years old and who knows what ammunition has been used in them.
A good site to read information about them:
Any question you could think of asking has probably been asked and answered on that site.