Gordon aliexpress seems to have several enclosures
Sorry for spam didn’t know how to post this as a reply.
3 AA battery holder plastic enclosure for pcb distribution box
(from AliExpress Android)
Wow that looks nice. But 25usd for post?
Didn’t check shipping. But same enclosure is available with several sellers. I only see shipping costs to belgium. But for a few euro’s i get shipping to belgium for 3 enclosures. So for about 10 euro i can order 3 pieces. Not to bad. 
Even with shipping, still cheaper than Newark/Mouser/Digikey… a lot slower though.