Help Kuba walk again!

Hello everyone!
My name is Kuba, and few days ago I had my right leg amputated.
I was born with a congenital leg problem. 10 surgeries, childhood spent in hospitals and still, 35 years later the only option left for me was below the knee amputation.
Disability slowly removed many activities from my life.  No longer I was able to run, walk any longer distances, work in my proffesion. 
The strongest passion I have is flyfishing. Being able to go out and fish with a fly rod is one of few things that keep me running, dealing with depression and disability. Now, it looks that even this aspect will be removed from my life.
That is why I decided to ask you for help.
Buying new prosthesis, that will allow me to continue my hobby (one that is waterproof, especially for salt water) is beyond my financial abilities.
The total cost of new leg, fittings and rehabilitation is around 15 thousands euros, completly beyond my reach.
And that is the only thing, that will allow me to have a normal life, continue my passion.
And, to become an awesome pirate too!