Rave reccomends replacing the complete hub assembly at around £300 per side. Replacement Timken bearings are available on Ebay for around £80 each. I replaced the bearings on both sides a few months ago and after stipping the hubs off, it took less than 30minutes to remove the old bearings and press in the new ones. You will need the use of a 30ton minimum Hydraulic Press-you will not remove or refit the bearings correctly without one as they need to be pressed out & in dead square.
Send me a PM with your email address and I will send you a step by step guide.
I have the mandrels and tooling for the operation, but Bulgaria is a bit too far to send them but I am sure a local engineering company or good garage will have something to do the job. I can let you have dimensions of the tooling if you wish.
Finally, I would replace both sides whilst you are doing the job.:beer2: