Capturing, or duplicating a pre war vintage Rigby is not going to be easy, or to do it properly....cheap.
The appeal and handing are in many hidden and difficult to duplicate features, not the least of which is the fine intermediate length original mauser sporting action, allowing exceptional finish and feed
The stock will be difficult to duplicate, both in form ,shape and balance unless you have access to an original, and even then....
You may wish instead to build a nice " English style" rifle that you will be happy with.

Best
Eric