Well today after much homework and talking to guys whom know bearings; I have found a number for a hybrid ceramic SKF bearing that is off the shelf.
SKF 6204-2rsltn9/hc5c3wt
A chap on BOXA net in the UK dragged a bearing from his 2.5 with this number, so did his car have a ceramic update at some point?!
It is obviously a 6204 but with high temp, high speed, better seals, ceramic balls and composite cages.
They retail for about £70GBP here in UK
The standard 62042RS is about £3.50 - £4 GBP, so quite a jump.
Ive gone for an uprated over standard so high temp and speed, but not ceramic, £16GBP.
Will be sufficient for the time I will have this engine in the car.
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