Sorry to hear about your loss, lee. I know how it feels. A couple of years ago we had to put down our dog, and she was one of those big dumb friendly types. But her legs had been getting weak, she was incontinent and she was shaking and throwing up a lot. We knew from her age that meant the end was coming, and we didn't prolong it.
I have one especially fond memory. On the morning we were to take her to the vet to be put down (about noon), we helped her outside and we just sat on the grass and watched the sky, the trees and the birds. It was perfect weather, about 72º F, and our family just sat there with her in the grass and talked to her and comforted her until it was time to go. Damn, I'm getting misty-eyed just writing about it.
Anyway, she enjoyed it, even though she hacked and threw up in the grass a couple of times. She didn't resist, as she usually does, when we got to the vet's office -- she was just too tired. And the vet of course was very nice. We watched her go to sleep and we all cried.
Lee, perhaps this is the wrong time to be suggesting this, but when you're over it, it's probably time to get a new kitten. You won't forget Stump, but you'll spend a lot of time transferring your affections to your new friend. It always seems to work for us. You'll have a new buddy to enjoy, and lots of fond memories of your old one.