have you tried the snugtime/big softies sleeping blankies? like fleece all in one jammies with feet that either go over the pyjamas or in place of pyjamas...they go up to a size 7 or 8 i think..... google snugtime and have a look at their website....
Yep....I agree. Snugtime ones are great. You can layer under neath too, so she can wear her normal PJ's under neath.