I think they are the same although ebay prices are from way too cheap with an unknown maker to £200
Best place I found are local motorist places normally about £40-£45
Although you may need a bolt set too and a new set of gaskets, the bolts normally rust up an seize
Youtube channel of mods an track pics
http://www.youtube.com/user/busternorris?feature=mhum
Website: http://www.roughluckracing.com/ MG Rover Mobile Repairs Nationwide and Western Europe