I will not allow anyone to risk losing their powers over my foot. I will wait for a prosthetic replacement or for Haas to research a way to create one out of force.
As far as payment, I don't have coin, but I can pay with a mighty staff. I have no need for a weapon in combat. The Great Lizard has blessed me with all I need in battle.
* The staff is a +3 disruptor (undead make a DC 14 Fortitude save on impact or they're destroyed).
Shame you won't use a clicker, there are a number of people on the plateau that would trade you.
That said, Grant or Haas can contact Reik and some Drunnbar follower will make you a admantium foot / leg in exchange for that. The value of the staff is such that they will have it done in two months.
You will have a -2 penalty to Dex and your speed will be reduced by 5 feet, but will now have a 2% immunity to critical hits (the off chance that they hit your foot.