I got mine from Ebay but they were ford originals.Lucky to find them though as most on ebay are aftermarket. The test I used was to simple turn your wheel on full lock and grab the anti roll link and push and pull.If there is the slightest of give then thats the problem. The most difficult part was getting the old one of.Its a double handed job (2 spanners or spanner and socket but acsses is difficult). When putting the new ones on I needed someone to sit on bonnet so suspension lowered far enough to attach both ends of link. There are more detailed instructions on fitting on here however! Good luck