Librandi's in PA did mine 20 years ago and it looks new today. And I drive it. https://www.carchrome.com/
I had a 1970 rear bumper converted to N25 by Rusty Davenport. I got the bumper to Bowling Green and gave it to him there. He worked his magic and shipped the bumper to Tri City Plating, and they shipped it to me. This was back in 2008, so almost 16 years ago. Rusty charged 275.00 for the conversion, and shipping to Tri City, Tri City charged 495.00 + 50.00 shipping to me. Bumper still looks flawless.
Tricity did my 67 front and rear for $800 each (Oct. 2021), just rechrome no extra work as they were straight.
Tri City gave me a quote of $2100 for a pair of '66 bumpers in Sept 2022. That's with drop off and pickup at the Carlisle Pa swap meet. I didn't get quotes when I was at Carlisle last week, I did stop at Bumper Boyz to look at their price list.... $1500 each! You got yours done in time to beat these crazy price increases!