Where to source EIBACH ball-joints

BGTV8

I have had EIBACH front UCA to permit decent camber but have a 6-hour club event coming up in 8 weeks and want to replace the FUCA ball-joints as a preventative measure, but the forum suppliers I have emailed don;t stock the ball-joint as a service item.

Does anyone have any suggestions / URL's I can go to in order to purchase.

As an aside, my car has seen a "lot" of track-day events in the 3+ years I've owned it, car club circuit sprints and the like and the gearbox is now suffering a little (after 70,000 road klics and maybe 3000 klics at race-pace) - the biggest problem is 6th gear syncro .... it baulks consistently and will refuse to shift at anything other than lazy pace once the oil gets hot (say after a 12 lap run at full-noise). On the road, a skip shift from full-noise in 3rd direct to 6th will gernerate a dose of the crunchies every time (like when accelerating the car on a freeway on-ramp to get up to speed and merge) unless it is a really lazy shift. I have been using Motul Gear300 (75W90) in the trans ... does anyone have any empirical evidence of improved shift with heavier oil or do I bite the bullet and put a rebuild kit thru the box.

I could always drop my Holinger 6-speed sequential into the car but it is straight-cut and the noise will be over the top for a DD.

It is worth noting that the NISMO RC specifies Motul GB oil, but does not specify the viscosity - I;d expect 90W140 for enduro and 75W90 for sprint races and nothing I've been doing would qualify as endurance events (upcoming event apart). They also quote 5000klms as gear-box life, but my box has done around half that ...

Do the track day heavies have any feedback (or maybe Doran Racing).