Pulled the dog bone off again after sourcing some new seals so I could get the bearing size, they were absolutely bone dry and the inner surface was badly marked but didn't feel pitted or scored on my pinky although that's not to say it isn't.
So far I've found the linkage seals for a fiver (bit much) on yambits.com and the needle roller bearings 17 x 24 x 15 for about twelve quid each on simplybearings.co.uk, better than £120 from main dealer I suppose, now I've got to find some bushes as they're a bit marked also.
Didn't make any difference to the movement but I'm not done with it yet.