Midnight's blocked bladder

My cat midnight who is a 4 years old cat who is one beautiful, gentle, cuddly cat, anyone that knows me and him knows how much he means to me. He means more than life to me, he's a dog in cats body who loves everyone. Unfortunately we have found out that he has got a blocked bladder full of crystals (like bladder stones) he has had to be sedated to try get the crystals all out, but unfortunately they weren't able to completely remove them all and is now in after hour care to be watch over for the night as his bladder is full of blood as well as injuring his kidney due to the pressure of his bladder because of this he has to go on a special diet to help prevent this in the future. If anyone has anything to donate with the cost even its just a dollar would be appreciated. I understand if you can don't donate anything but could you please share. Any help would muchly be appreciated.