Various single Moderna Vaccine vials are available and can be purchased separately.
All Single Vials - 8 x 38mm - from the Kinesiology Testing Kit range (KTK) in Australia:

Before ordering any of these vials please note the following......

These vials may appear in the latest  KTK Vaccination Testing Kit.  If you buy this kit you may not need to buy these vials separately. Please check the Vaccination Testing Kit list, or enquire. The Vaccination test kit is updated occasionally, but any new vials may lag in being included.