Brake seals

[Oscar]

Want to replace the seals on the old calipers, wondering if these are any good, not many choices showed up on fleabay!

http://www.ebay.co.uk/itm/FORD-GRANADA-ESCORT-COSWORTH-SIERRA-COSWORTH-REAR-BRAKE-CALIPER-SEAL-KITS/221165103567?ssPageName=WDVW&rd=1&ih=012&category= 63717&cmd=ViewItem

Using the rear discs and calipers off my donor, a sierra 4x4.

Any help regarding either the seals or this guy on ebay would be apreciated...