I bought one from transit parts .......... dont fucking bother, fitted it and it sounded ten times worse than the noisey original and it was throwing the belt around that it wasnt going to stay on so those are best avoided.
My original was put back on and still is on although still want to get it changed, ford parts do a kit with a tensioner aswell but its between 300-400 quid be near 400 if you buy the 2 seperate rollers aswell.
exspensive
Sounds like I definitely need to get genuine ford bits then!
Brian