To answer the question directly;
Where to get a 46mm camera...
There have been Camerz ones on eBay with no bids in the $100 range + $35 shipping.
I think Camerz Z1 (early) had a Schneider lens. Later ones had something Japanese.
These cameras came with I think 4 different film mag options (2 @ 35 mm, 2 @ 46 mm) so make sure it's what you want.