Holger-

Because, the tie rods on the 2nd gen are part of the steering rack. One end has a TRE, like above, and the adjuster threads into the rack. The weak part is the threaded center adjuster and since you are limited by the fact it is tied into the rack, you are limited in what you can do to fix the problem.

At the least, you would need to either look at swapping to a beefier rack, (in general R&P racks are not what you would call beefy in the first place) or figure out what to do about fabbing up parts that would allow for a larger diameter adjuster. But, you would never be able to go to the internally threaded style Matt has above. It just would never really fit into the rack AND anything that increases diameter of the adjuster is going to interfere with the edge of the rack and you will loose angularity.

The shorter version: It just ain't possible. Even with money, this would be very highly improbable.

Michael