Saving Baby Rooney

On Sunday I was volunteering as a photographer at the North Central Animal Shelter in Los Angeles and fell head over heels in love with a five-week-old tortie kitten.  I couldn't leave her at the shelter so I fostered her and her brother.  I named her Rooney.  When I went home to feed them lunch today, Rooney was seizing.  Her limbs were stiff, she couldn't control her head, and she was screaming.  I took her to the emergency vet and luckily they were able to stabilize her.  The vet said that Rooney was so hypoglycemic that her blood sugar didn't even register as a number on their machine.  Her temperature was only 96.7.  They put her on a dextrose IV and were able to raise her temperature and her blood sugar back to normal.  She also ate a bit on her own.  She is staying overnight while they run tests and try to figure out what happened.  

The shelter doesn't pay for veterinary expenses and had I taken her to the shelter vet, they would have euthanized her.  (I fostered a kitten last year, Ruby Rose,  and the same thing happened; I brought her to the shelter vet and they euthanized her.)  

I want to do whatever it takes to save Rooney, but her medical care is very expensive so any help I could get would be greatly appreciated.