Thanks for your help, jack daniels!!
It was easy peasy lemon squeezy!
I decided to go for a Korean bearing (Orion or Origo?) as the car has now done 105,000 miles and if the new bearing lasts up to half of what the £155 bearing then I'll be happy. You were also right; you can get cheap bearings for ~£50 on eBay and quality bearings for ~£100. The £155 was from a local car parts shop. The £74 I paid for mine was from Euro Car Parts.
Car is quiet again!!
Thanks once more! Oh, and I posted pictures and how-to here:
http://www.matrasport.dk/forum/index.php/topic,1865.0.html