i do tht too if there matty theyd maybe be bit bigger tho ? theres quite a few https://search.ebay.co.uk/search/search.dll?from=R40&_trksid=m37&satitle=maternity+pyjamas+16
you could go somewhere like simplybe? they do maternity clothes, but no PJs but their PJs are 2 for £18 or something, so that's not bad https://images.drct2u.com/content/images/products/he/he551/x_x_he551_x_huge.jpg they're £6 https://images.drct2u.com/content/images/products/he/he893/p2_x_he893_x_large.jpg that's a pack of 2 for £18 (2 sets I mean) the url is www.simplybe.co.uk
i was going to sugest asda mix & match there £5 for pj bottoms and £4 for the vest tops. Or peacocks do some nice mix and match pj's i got 3 pairs when having owen and i'm still wearing them now very comfy!