I'm also looking for those last night and they're also called cable tie mounts. It depends on the applications I guess. The rig builders at HRI seem to use them to let the power cables that come from the power supply units pass thru them to keep them organized.
I'm looking for ones without adhesives though as I'm planning to use velcro underneath them like a pedal. I ordered a pedalboard from nycpedalboards.com and their board surfaces are the loop side of the velcros so factory-installed adhesives would be out of the question.