Need a barrel for Remington Rolling Block

I found a Remington Rolling Block #1 receiver with a rotary extractor at a gun show. It is fit to a unfinished stock. I picked it up for $250.

Now I have to find a barrel and forearm stock and the associated hardware, so I have a few questions.

Can a barrel with a cut for a straight ejector be made to work with this receiver?

Are there any places that make threaded barrels for the rolling block or is it a machining only option?

Anyone know of some good resources for assembling one of these? (Parts, gunsmith, knowledge)

I thought I had seen some information on building a rolling block rifle in the past, but for the life of me I can't find much now as far as the Internet is concerned. I haven't went by the library yet.

Any help would be appreciated.

BW

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Don't know about that but if it's possible I think I'd convert to the sliding extractor. Seems a little more robust than the rotary type.

Check Green Mountains website for a barrel.