Hi Demonwolf

Where are you in Yorkshire?

Also what vintage is your rifle. Many early Holland rifles used Joseph Brazier of Ashes locks so sourcing main spring forgings should not be a problem, although it would have been helpful to have one original from which the new one would be copied.

Further, and possibly of a rifle of the vintage you are dealing with, the action and fore end would have been made from forgings, at the period in time quite possibly by Phillipsons, finding one today may be purely down to luck I am afraid and quite likely will end up with you having to machine one from barstock.

I had a build project a number of years ago for a large double and, at that time I was able to source some part machined parts in the white from a then contact I had at their Harrow Road factory which took a lot of machine work out of the process at our end as these were in final form having been EDM wire eroded. I am not sure whether this would remain an option given the company is now under new ownership, even then the prices for parts were not cheap. But given no one else offered them, the costs were justified, if you could obtain from them a forend iron in the white you may be able to work back from that.

Not sure this helps.

Regards

Jonathan