At this time I am not sure what price I will be asking.
I have had so much good help here that I will do for you as has been done for me in the past. I will make you a pair and ship it to you at cost beings your the first person to ask.
Paddles before upgrading them cost (must find out)
Thread protector (not protecting my the threads, a nice way to secure the ball knob in place) 40 cents (looking for a better solution)
New potentiometer cost 50 cents USD
Ball knob $5.00
Double the cost for the fact it is double the parts as it is two controllers in one
$11.80 USD before the purchase of original controllers that I can probably get on e bay for $5.00
Possible total of $16.00 or so just for the way,I have mine.
If your interested I will make this for you at the honest cost.
This is most definitely not the final set and these are just a test. I grabbed my worse set of controllers that had noisy pots (jitter in game) as well and slightly busted plastic cases. The inner screws on both were broken and I had to fix them with glue in hopes the position were good enough to still screw in place. I did a good job of that as it worked out just fine.