I assume you mean these? http://cgi.ebay.co.uk/PAIR-BLACK-FAUX-LEATHER-RECLINING-SPORTS-BUCKET-SEATS-/320594850475?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4aa4f132ab#ht_1643wt_1141
I can't see them being better than the standard Zed seats, plus these seats won't have electrics, heating or airbags. Who knows how cheap seats like that will perform in an accident
I think by the time you've bought all the rails etc and got them to fit you might as well either get your standard seats re-trimmed in some nice leather or whatever, or save up some more for some decent seats.