ACS might help, it's worth a shot if chicks are dying and there's no way to access other treatments.
Yes to the baby food that's a good idea. Cooked beef liver mashed up well would work too, but baby food is ready made:)
Yes, Corid is extremely hard to find there. You may be able to order some to have on hand for the future.
Some have reported that a vet *might* give you some, but you'd have to call around.
If you happen to know a cattle farmer ask them if they have any Corid that you can have.
It's the...