With the restrictions on  in-out border runs, it looks like many travel companies specializing in visa runs have either gone out of business or switched from daily big buses to irregular van service.Which companies are still doing the Bkk Cambodia visa runs? Which one is the best in terms of price,service, speed?

This one that does the them to Ban Laem from Bangkok. http://www.thaivisaservice.com/

Bangkok Buddy does them to Poi Pet.

Thaivisaservice runs a good service IMO, their website currently states that you can do 3 out/ins in a year at that border,

i highly recommend bangkok buddy.  Mechanics are the standard , but the manager is so pleasant and responsive that she deserves the business.