try here first to see if they can get you the parts.
or perhaps http://www.bekkers.com
might have kits.
erebuni and nrauto definately have them in replicas, including some other nice looking kits.
I believe nrauto has a replica lorinser kit too for the 124 chassis cars.
Either way you are looking at spending at least a grand if not more for the parts.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.