The bearings are in the hub, not the wheel.
Ducati don't sell the bearings, only as part of the hub. (£300 ish!)
Anyway, drift out the bearings and get the numbers off the side of them and get youself down to a bearing suppier near you.
www.yell.com.
The haynes manual states that the bearings need to be pressed or drawn into position but I used the old brearing to drift them back into place and they seem to be fine.
You could make a puller using a treaded bar and some thick flat steel if you want.
Put the brearings in the freezer overnight as this makes them a wee bit smaller and easier to install.
Do a search for rear wheel brearings under my name as I posted the numbers you need to give to the brearing supplier.
