A company by the name of Narragansett Arms made a short run of replica Fergusons in the 80's or maybe the early 90's.
I think only about 250 or 300 total.

You can buy a FergusonRifle 'kit' from The Rifle Shoppe, Inc. in Oklahoma.
Their kits are rough castings as far as the metal parts go and alot of work is needed to build their rifles but they have some nice ones.
A Ferguson kit from them is about $1700 or $1800 w/ an assembled lock IIRC.