Strip it down to just the Barreld action. Find Morgan with Class3Machining on FB. send the barreled action with payment and a return shipping prepaid label.
He is in the Dallas area
Highly recommended.
JPSO has one at 3300 Metairie rd . In front of the admin building. It was established after the murder on the Westbank during a motorcycle sale.
https://www.wdsu.com/article/jpso-creates-safe-space-outside-station-for-internet-purchase-exchanges/35844213
MD, I believe he is wanting to swap an A2 FSP to an A2 F marked FSP.
That usually takes a special jig/fixture to align for the re-drilling of the taper pins
My $0.02 , I would send it to a company like ADCO to replace the A2 sight post using the correct taper pins etc..
I personally know several gunsmiths who could do the swap but I also know there are companies that specialize in things like this who are very knowledgeable and have proper jigs and...