UPDATE:

My parts shipped from the UK today. 132 dollars worth of linkage is coming and sadly I am perfectly happy with how my throttle feels right now. But I will post pictures of the solution the Aston Martin guys came up with. They are shipping me three carbs worth of

levers, springs, brackets, etc. Pics to come.

  Blue said:

That is good news. For the interest of all, Pierce Manifolds sell the 47605.009 strongest springs however they do not show up on the website.Just ordered 3 last week.

BAD NEWS: I bought these from Pierce back in April and had them shipped to where the triple webers were. I finally drove the 600km to re-tune the Webers and the springs sent were the wrong ones.... shorter and thin....i.e. weaker. This was disappointing.

Try Spruell Motorsports as mentioned above.

Got the Spruell's and they are correct 47605.009's at 33% stronger than the 47605.027's.

  Blue said:

Got the Spruell's and they are correct 47605.009's at 33% stronger than the 47605.027's.

Excellent, thanks for doing the testing Phil!