I think that simply sitting in the room with a bowl of food 5-10 feet in front of you would help. Do this at feeding time, sit there until they eat if you can. If they come out and eat, next feeding time move the bowl an inch closer. Continue to do so until they are comfortable eating right at your feet or even better, in your lap. Then you can work on playing/grooming/nail trimming etc.
What I would do first, though, is take them to the vet. If you don't have time to do what I suggested above the vet could possibly take them or will know of a good place to bring them.
Also, their adorable but I'm quite a few states away from you, sorry! :)
Lucifer, Gabriel, Titan, King, Finnegan, Fin-again & Ricky.
Lucifer & Gabriel are my only non-rescues...