Alot of the people on here are very experienced when it comes to Bearded Dragons there are also breeders on here that are all willing to, and already given you all the advice you need to help your dragons grow. You have been advised on numerous occassions to seperate them so they can grow to their fullest. I do believe you did this but the one stopped eating. This is to be expected as they will suffer from relocation stress, i know this as i had 2 together and seperated them, and my female was very stressed about the move, it took her about 10 days to settle down and get back to normal. I know it's hard to watch them not eat but it is for the best.
If you feel you cannot care for them both then why not just re home one of them, because you only wanted one in the first place but got sent two?? :wink:
Even though you don't know people on here, surely it would be better to re home it on here as everyone is so helpful, that way you could also stay in touch and see how it's doing.
Also.... without sounding mean, you never know when you may need these guys to help with a serious problem with your guys, vets are not cheap, this is a great place to ask questions and seek advice without having the huge vet fees on top.
have a think about it, good luck