'Buy your own' for the QJSM would at least go some way to redressing the parsimonious way it was issued and the ill-feeling which that caused. Only 3% of Armed Forces personnel received the medal.... Qualifying criteria should be simple enough - to have served for 5 years in the first 25 years of HM's reign and to have been serving on the date of Her Silver Jubilee.
'Buy your own' NDM? A somewhat different matter. What are the intended qualifying criteria?