Is is possible to get a non B from Cambodia?

THanks

Yes, a single would be possible but I would recommend another destination, such as Malaysia or Laos. Cambodia will take at least 4 days to process, in other countries only 2.

The non-B requires paperwork, such as work permit (application) and documents from your (prospective) employer. For a multiple non-B additional documentation might be asked.

Yes or otherwise try Yangon. They issue non-B's overnight so if you apply in the morning, you'll get your visa back in the afternoon of the day afterwards. Actually, when I applied there I arrived in the afternoon and got my visa back the following day in the afternoon so they were quite accommodating and helpful.