Call Tom at TPC, they know which ones will work for you and what to buy. As for the cable...on the GT3 its the opposite of the S, as to if it come out of the top or bottom of the shock. They often have slightly used ones for sale at great prices.

 

I would bet that if you enter a WTB ad in The Marketplace you'd receive some responses from people who have upgraded their suspension to something non-OEM and would be willing to sell you their stock shocks with springs downright cheap, I'd say way under $1,000. Mileage on them will likely be in the 20,000-30,000 mile range and you'd get OEM non-leaking, low-mileage shocks, plus fresher springs for way less (I bet under $500) than new OEM or aftermarket shocks alone.

 

You know shocks do wear out. Shocks that are leaking have failed. Shocks that aren't leaking but don't do their job are worn out. You've got 91k on the original shocks. How long do you expect a shock to last before wearing out?

You cupping tires are telling you your shocks are WORN OUT.