Thank you so much for all your suggestions!
Unfortunately, Cath Kidston only have matching ones of soldiers and guards - DD is very much of the pink/purple/glitter fashion school and will not consider anything which could vaguely be considered boy-ish. Not my influence I hasten to add - I refused to buy pink baby clothes and this is my payback.
Next is a good idea - but not sure a girl's age 16 would cope with my size 14 bum!
Chartlotte & Co ones look perfect, but they are sold out in all the girls pjs except for the grey owl ones and I'm not sure if DD will wear grey on the basis it's not girly. Might have to show her them on-line and see what the reaction is.
The White Company, I thought I would strike lucky with this suggestion - but sadly no matching ones there.
Hanna Andersson have matching stripy pjs in stock, in the right size - yay! Oh, it's $40 USD for international delivery...maybe not.
The Bright Company only seem to have matching pjs with black patterned bottoms and DD doesn't like black.
Jigsaw - I can't see any Pjs on their website unfortunately.
I don't get to the shops in real-life much, but will check out Primark when I do. I'll check out Topshop and Tesco/BHS for almost matching Disney ones, but any more suggestions would be very welcome!