Need front driver brake caliper for my 2000 ML 430. Part number is 163-421-19-98. Prefer rebuilt. Can't find it anywhere. Help! and Thanks!

This place has them -

2000
Caliper
Mercedes ML Series -LH,ML430,163,ESP,FR ONT B P259MT $75.78

http://www.mbpartsonline.com/recycled.html

Also have them here http://www.mercedes-benz-parts-direct.com/

CALIPER, REB
163.174 - up to A 145272
- up to X 707755
Left
163 420 00 83 88
Front Caliper, Rebuilt
163.174 - up to A 145272
- up to X 707755
Left
Front - left MBZ078297
NuGeon $90.19
EACH
Core 50.00

Try:

https://www.********.com/applet3.html

The listing is at the link.

I have called many of the online parts places that say they have the part and when I give them my VIN they say that the part they have will not work. My VIN start with A170. Can I successfully use these parts anyway? Is there any real practical difference between the parts? I only need one and can't afford to buy dealer parts - especially since they only will sell the part in a pair.

Help!!!

Has anyone found a source for the caliper rebuild kit itself?