https://www.ebay.co.uk/itm/Volvo-240...sid=m570.l1313
Ashley Classics & Retro – Sale Rd Mcr.
The above are descent companies to deal with and may be able to help?
An idea:~ if the black are the same as the chrome then you could etch prime & top coat in black satin, the metal window trims are the same i.e. black or stainless so you may be lucky.
Bob