Tigger Needs Surgery

Tigger is my cat and best buddy for 8 years now. When I first adopted him, I was informed he was a girl. For over 3 years, we bonded and I took care of Tigger. Until one day, when Something just didn’t seem quite alright with Tigger. I took Tigger to the vet and was informed that there was something very wrong with my kitty. Tigger was a boy and close to death because of it. He had developed crystals that got stuck in his urethra and blocked him. It took several tranquilizers and flushed through his catheter to fix the situation and save his life. He has to now eat special food to help decrease the possibility of him developing crystals, but stress and other uncontrollable factors could still cause them. He has been blocked a couple times since and every time it is an emotional roller coaster and a few thousand dollars. He needs surgery to widen his urethra and eliminate the risk of him ever becoming blocked again. Please help me help this little boy, who has always been there for me