The place I used in Kansas closed about 2 years ago. The last price I remember was $350 for a pair to rechrome the potmetal(that was over 5 years ago).
I see the original poster on this item "Rondercurtins" was going to have to pay over $ 1000 for a pair to be rechromed (not sure what he did).
I have not tried to find another pot metal rechroming shop.
The other issue is even finding used 61-62 Convertible only outer pot metal frames and then the prices are expensive
See this example $500 for a used pair................
https://www.ebay.com/itm/334094235100
I have sold off my extra convertible items (and found the market is crazy for the original convertible parts) and the basket case convertibles and guys who are restoring them, are driving the parts for convertible market (these formally overlooked rough convertibles need parts normally).
You might find the frames but you have to really watch lots of sites
to catch a fair cost for the frames. Plus finding one side is even harder.
I do in fact have a pair of 61-62 convertible vent window assemblies but they are already sold(I think). (they need to be rechromed and do have pitting in them).
I suggest you have yours rechromed even with the pitting. A good rechrome shop will know if they cannot get rid of pitting for a show quality job.
I would say that a few pits in the originals can be fixed and you will not see the pits when they are rechromed.
Paul