just go to your local bearing supplier

size is 42x80x42 double row deep groove, I just replaced mine with Alko trailer bearings same size £19 each.

you also need to replace the bolts, I bought bolts from here
http://www.ebay.co.uk/itm/161214378076? ... EBIDX%3AIT

you need 24

M8 x 50

yes the CV bolts, you have to remove the shafts to do the bearings, so new bolts needed.

repacking CV joints is a waste of time and very messy, the best thing to do if you are not going to replace them is swap NS for OS then the load is on them in the opposite direction, so you have new bearing faces to use,

if you are doing this yourself a Arnworx bearing tool is a dam handy thing to have, as the manual states you need to remove the trailing arm completely and then heat to 150 degrees C and use a press.

I did both sides in 3 hours for a total cost of £50 including bearings and seal and bolts

They are the same as BMW 5-series. I bought them because they were cheaper than ones for Porsche 944 from the same vendor - which was Euro Car Parts.

buy one of the eBay wheel bearing puller/press kits listed for a fwd car. They cost around £37 and it will save you ALOT of bother, you don't need the Arnworx tool as these do the same job and come with many fittings so they can be used on many different vehicles.