Eye Surgery for Buffy & Scrappy

Buffy and Scrappy were born to a stray cat and rescued with their other 2 siblings by me.  Buffy and Scrappy have Eye Agenisis, a rare genetic birth defect in which there is an absence of the outer aspect of the upper eyelid.  The parts of the eye that are not protected by an eyelid are constantly subjected to any dust, eyelashes and hair that come into contact with the eye. As the eye continues to be aggravated and inflamed, it is more susceptible to infection and corneal ulcers. The recurring damage sustained by the eye can cause scar tissue to form. The cornea may thicken too much to try and protect itself from the irritation, and the cat can suffer from painful, hard-to-treat ulcers and eventually lose sight in the affected eye.
On October 8, 2015 They underwent a surgery to try and construct an upper eyelid rim.  Unfortunately, this surgery was not a success, and infection set in.  We took them back to our regular vet and they were under medical boarding at the vet's office for 6 days to clear the infection.  The fee was $652
Yesterday we  visited with an opthamology specialist who will perform a corrective/reconstructive surgery on both kittens to save their eyes.  This surgery and medications will run nearly $2500.   I'm asking for a little help.  Without this surgery the kittens may lose their eyesight. They are only 6 mos. old and we want to give them the best chance possible.
 Thank you in advance for any help you can offer.