M3 -Valve spring retainer questions...

["Rob" <motor@xxxxxxxxxxxxx>]

    Okay guys and gals,
it looks like a local shop is going to weld/machine my cracked M3 head to
get me back on the road for waaaaaay less $$$ than buying a new or used
head.....
let's hope it works!!!

 While the head is in a zillion piece I'd like to update/upgrade the vave
spring retainers since I've heard the ealier (02/95) prodution heads have
some problems in this area.
 Which retainers do I need to buy?

Thanks
Rob
motor@domain.elided

------------------------------