Mercedes Benz repair: catalytic converter install, mercedes benz 420sel, number search results

Question
Has any one got info/experience installing after market cat on a 1988/1991 sel 420 mBenz ? OME part cost $2750.00 plus labor.Crazy. Are there any workable short cuts or work a rounds that are OK.?

Answer
Gadzooks...
Where did you get that price?
DIY could save you $2000.00+ USD, which will buy a lot of tools.

Try these links:

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 420SEL
Part: Catalytic Converter
 Note:  50 States
 Product   Brand   Availability   Retail   Our Price
H3000-74199 Catalytic Converter Federal Only   A & B Auto Parts IN STOCK $621.06  
  
H3000-49563 Catalytic Converter Federal Only Bosal IN STOCK $572.37  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=merc...

OR this one:
PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 420SEL
Part: Catalytic Converter
 Note:  Federal Only
Also need #BOSALWAR/CAT. "After-market" OBD II Catalytic Converters Not Legal for Sale in California 1995 ON     
 Product   Brand   Availability   Retail   Our Price
H3000-74199 Catalytic Converter Federal Only A & B Auto Parts IN STOCK $621.06  
  
H3000-49563 Catalytic Converter Federal Only Bosal IN STOCK $572.37
http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=merc...