I think the little guy is going to make it. This morning it's crop fully drained and it is pooping normal poop, no more hard seeds.
It's holding it's head up and overall improvement. Discoloration has improved but not all the way.
I could not find Papyra extract or puree at the grocery store I went to. I really wasn't sure where to look. I looked near all the other extracts and canned fruit/veggies but no go.
I'm feeding it 1/2 cc of formula mixed with 1/2 cc of heated pedialyte. I plan to change the ratio to about 1cc / 1/4 cc when he gains a little weight. It seems very receptive to feeding this morning. Thanks to everyone for all the advice and help. I will let you know how it turns out.
Im sorry if this has been said. But whenever I had chicks with sour crop (wild birds I had found, never had a cockatiel or any of the companion parrots I raised get sour crop) I would give it UNSWEETENED apple sauce mixed 50/50 with canned unsweetened PINEAPPLE juice. Feed it for the whole day until the crop has clear up. The citrus in the pineapple juice will break down and kill bacteria and fungal issues. I learned this while volunteering at sarvey wildlife center.