Are you a member of the budgie forum because when one of my budgies was ill I asked on there and there is a member called Barrie and he's a breeder and knows everything about budgies and how to treat various illnesses. I had a poorly budgie and he recommended me getting something which I did and he's absolutely fine now and I didn't even have to take him to the vet.

Budgies - Budgerigars - Budgie Forum