I recently got the super HD tie rods from Lanner in and they were spot on with regard to the length and are truely a very nice engineered piece. You'd think its just a tube with treaded ends, but the attention to detail of the ends is excellent and just that bit more than you can manage yourself. But that is just my take on this.
I got the idea that since older 911 porsches use the stronger, thicker tie rods of the newer models as an upgrade, this upgrade for bugs doing track days (think curb stones) makes even more sense: The super beetle tie rods are longer than those of a 911 and those of a '75 model 1303 are the longest. Whats more, when you use 944T spindles, you need to use even longer tie rods, making the use of stronger than stock tie rods even more 'a good idea'.
My stock, already lengthenend tie rod weighted about 600 gramm. The super HD ones are about 1 kg

They are a bit larger in diameter and (much) thicker in wall thickness.
Here's the rods in comparison and installed (I was busy there anyways):