I put FD front calipers on my FC , they are a straight fit with no messing at all Ive read that the FD Calipers are less likely to seize up like the FC ones can http://mazdarotaryclub.com/forum/index.php?topic=79861.msg860543#msg860543
Would just like to point out that the Passat drop links are not interchangeable. At least on an S4. Don't know about the S5.
ive just checked ebay and they are about 15 for a pair http://www.ebay.co.uk/itm/FOR-VW-PASSAT-1996-2005-FRONT-STABILISER-ANTI-ROLL-BAR-DROP-LINKS-PAIR/330938913825?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D47049%26meid%3D6bddbb9fe06542c58fc2135780a229d4%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D330938913825&_trksid=p2481888.c100675.m4236&_trkparms=pageci%253Ae1cf7c1c-97dc-11e7-85a1-74dbd180e741%257Cparentrq%253A770f851a15e0a9c477a16c5ffffdf334%257Ciid%253A1not sure if you need front or rears ??
just been searching for the post and I cant find it basically I took the cheapest shower curtain , put a blanket over the roof , then the curtain and roped it on to the wheels