eczema bandage suit for toddler

[enormouse]

Ds (21mo) has an eczema bandage mummy suit (top with scratch mits and leggings with feet). Unfortunately he's gotten too big to fit in it. He's had a slight flare up on his arms in the last few days so I unearthed it but it's a very tight fit on him.
Would anyone know where I could buy one in a bigger size? I got this through a dermatologist referral so I could go through the process of getting an appointment but I want one sooner rather than later.

(I would consider passing this small suit on if anyone wants it).

Thanks

GP can prescribe garments. Comfifast or Tubifast or Skinnies are the makes we've used. Once they get to a certain size though mittens are separate. Look online at those and then go to GP armed with what you want as in my experience they know very little about garments but are happy to prescribe if directed. Good luck.