Female pyjamas for hospital inpatients

Hello, for our female patients who require pyjamas for obvious dignity issues, we currently have to use male trousers with a front opening. We are are struggling to obtain female pyjamas from our current linen providor, It is not viable to purchase independantly as we would require so many. Obviously we encourage the use of own clothes where able. Can anyone curently in a hospital setting using female pyjamas, advise where you sourced them. Many thanks