Don't quote me but I think Bertran is dead. Seem to remember he died earlier this year.
Sheeit mate !
Bad luck or bad news there.
Personally I have always found the OEM on mine to be quite adequate and have never felt the need to change after 40,000 K's.
One of the forum sponsors ( I think !) did sell chrome original "lookalikes"
thanks boys.
still waiting......................