Well, looking at FastLane I see you could get what appear to be new calipers for less than $150.00 ea, and rebuilts for less than $100.00. The leveling valve is between $250 and $363, depending on which you get. Didn't look for a caliper kit though.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.