Cardude - I went into the workshop this morning and got myself a fan clutch to see whats your request all about. I find its virtually impossible to open the assembly and replace the bearings. I understand that once the bearings are dried and died, its better to have the whole assembly replaced. I have not known of any successful surgery in transplanting or lubing a bearing in the fan clutch.
I hope someone else here might have done that before.
My apologies for thinking you wanted to replace the fan clutch.