Antique Window Art Replacement

[Aksel A.]

I need to gracefully restore the window exterior protective framing 

art (for a lack of better term) in the picture.

They are quite old (120 years), so at this point, I can try to:

- Salvage whatever possible, with a mix of scraping, painting and hacking

- Completely replace with brand new

Can you please provide references for similar window part frame parts at reasonable rates in New England? Appreciated.