I'll give this a stab from memory...
Some 25 years ago if you wanted a Sharps to reenact with there were few choices.
The NSSA boys had originals, and the cost of them were going sky high.
There was a very good and authentic replica imported by Garrett (I've owned #663 # 903 ) a 54 Cal. percussion carbine complete with a working Lawrence Primer, Made in Italy for Garrett Arms in Virginia, by Palmetto to high standards, in both Percussion and center fire 45/70 & 45/90 Mil. carbines.
American black walnut , and fit and finish so good that an original lock plate was a absolute drop in ( I know, I added them to 3 Garrett's)
I don't think more than a few thousand carbines were made ( the last were un-chambered un-head-spaced otherwise finished center fire carbines.
then there was the Sile grip company import , these If I recall were by IAB (Italy), not quite the fit and finish of a Garrett
not bad w/ European walnut. These had no Lawrence Primer ( not even simulated as Shiloh Sharps does )
These could be had for about $ 160 at Woolco.
There was a Mil. Carbine, and a hex & a round barreled sporter
IAR came along and Sile got out ( Garrett had closed his doors in about 1986 )
I think IAB will be Palmettos.
Shiloh introduced their US made Berdan Rifle , Mil carbine ( both a Richmond & a US issue ) and their current line of long range sporters ,Quigley Etc.
and then there is the Pedersoli CNC made line.
I owned 3 Garrett's (2 percussion & 1, 45/70) , 1 Pedersoli 45/70 carbine , 1 Sile percussion carbine , and two Shiloh (one a Berdan Rifle and one Richmond carbine )
and several Original carbines including 1 "59" and 3 "63" models.
The best repo IMO the Garrett ( best fit and finish, most authentic ) second (sorry guys) Pedersoli ( cost, customer service, and fit and finish and stout )
Shiloh is a close third , but their Customer service is lacking.
I had a bad stock on my Burdan Rifle ( cracked wrist though the tang screw from a knot in the grain )
After much, correspondence, they offered to replace the stock "If" I paid to have it fitted elsewere ( they were backordered and did not have the man power to do it.)
Mind you,I had waited nearly a year for my Rifle, that had the bad stock installed.
The Richmond however, bought slighty used , only issue was the Brass barrel band (which I lost reenacting on Horseback)
I could never get them to send me a replacement, I would call order it and wait for it to no show and order again, wound up making it myself.
Great shooters all though....
I've shot IAR ? yes not bad shooters, if it is priced right you should enjoy it...
Edit update: I was shown aEmail from Palmetto earlier today states , "they sold their tooling to Pedersoli .... "