From post #6 and #19 I learned they were handed over to the Dutch Government in December 1944. As to what happened after they left Britain, I only have two clues:
The first one, quoted from the other thread on this subject:
The other is a picture I found on MiliBlog captioned as "Bedford OXD 30cwt Dutch Canteen":
After searching the internet for a while I found out that it is sporting the black livery of the NIWIN or "Nationale Inspanning Welzijnsverzorging Indië" ("National Effort Welfare Care Indionesia"). NIWIN was an alliance of private welfare organizations for the benefit of the Dutch soldiers in Indonesia (formerly the Netherlands East Indies). NIWIN raised money and arranged for magazines, sports equipment, books and films for the troops, cigarettes, chocolate etc. and organized programs for development and relaxation. They arranged for Christmas hampers and from June 1949 also the so-called jungle chests, with sports and game items for the soldiers at the outposts.
Even though it says "geschonken door de gemeente ... ", which means "donated by the municipality ... " (somehow the name of the municipality is unreadable), I think there is a more direct link with Princess Juliana who is pictured in the hand over in post #19. As it happens, her husband Prince Bernhard was the chairman of the Committee NIWIN.
Not sure yet how many of these Queen's Messengers Bedfords ended up in the hands of NIWIN and if any of them were shipped out to Indonesia.
Hope this is of interest,
regards,
Hanno