Sorry Mike...I must have missed this one...
Not wishing to draw your meticuluous library records into disrepute but I have been doing some looking myself...looks like there might be a typo above or my own research could be wrong?
Probe 077906265J
Probe 077906265H
It would appear that the H is nearly a tenner cheaper than the J for some reason?
I am guessing when you refer to front this is pre-cat (before) and rear is post-cat (after)?
I might submit my list so far to a dealer and ask them to check part numbers are correct and see if they might offer a discount on a job lot?
Thanks & kind regards,
-=Glyn=-