peugeot 306D LX 1999 HATCH, REAR WHEEL BEARING SEALS?

on this car, the integeral brake drum consists of two tapered bearings, with an oil seal on the end of each bearing, i am having problems trying to purchase these four seals for each of the bearings, i have visited two peugeot dealers given them the chassis no & they get a diagram of the one solid bearing come up on the pc screen, is there something that i am missing? i would greatly appreciate any advice & help, many thanks.