While looking for Crankshaft shells I was pointed in the direction of this thread
http://www.sohc.co.uk/index.php/topic,9538.msg68584.html#msg68584I managed to get all my shells even the yellow ones (ebay.fr) I noticed link to Yamiya for a set of engine bearings costing around 175 euros + vat + import duty, etc.
I've managed to source 3 of them. 16003, 6205 x 2 & 16004. They are SKF bearings (so high quality) they cost me less than £30 including postage.
I used a company in Bootle, Liverpool. Bearing Source, Unit 11, Millers Bridge Industrial Estate, Seymour Street, Bootle, Liverpool. L20 1EE
Speak to James on 0151 374 2151, He's really helpful.
I'm trying to track down the others and will let you know if I do.