Saw this in GB. Not mine but I think one of our members that lists on this site has this. I would buy it but it is beyond my skills.

https://www.gunbroker.com/item/1083500094

Not a Gibbs pattern action, more of a Jeffery PD style action - well, Gibbs did use a similar action on a couple rifles.
Would be a lot of work, skilled work at that, to complete but I’d think that a good complete original action would run 4-5 times that cost.

Looks like a reasonable facsimile of the Gibbs-Farquharson military action to me.

This would be a wonderful project for a skilled machinist.