My daugher's doctor said it was perfectly fine to keep her on the no.1 formula until she is 24 months old (as long as she has a varied diet). No need to change to 6+ month formula.
Also, I've heard that Cow&Gate temporarily stopped exporting overseas as there was a problem with a illness the cows were suffering from. This may have changed by now but that's what I was told about 6 months ago. I normally got the C&G from Bumps to Babes.