Replacement for Hologram Nova R410 Cat M1 & NB IOT

Hi : We have been using the Digikey manufactured Hologram Nova R410 modem on the Beagle bone black. Unfortunately, we cannot get 50 more from Digikey to use on our sensors.

Does anyone know where I can purchase more ? If not, what is a good replacement USB modem that I can use which does not require any additional software development work on the beagle bone black ?