You may be able to find deals on fleebay. I got a set, one side was frozen, 350$ shipped. Then had them rebuilt, plus MB parts and pistons. Came to about $1K. Ebay now has them for about 450$ for each caliper. For that FourByFour price looks reasonable with 600$ each but I don’t know where the items are or uses MB genuine parts. http://www.fourbyfourclub.com/W463Brake ... iperFL.htm
. I think MB new is about 900$ each.