I bought this kit 126 270 44 77 from my local dealer (MB of Huntsville) and it included a 2 or 3 springs and plastic parts. The price was only $7.00 and it took 2 days to get.
When I first gave them the part number they said that it wasn't a good number because it was not in the EPC. About then another guy came by and said that he would look it up in another system and he found the number.