It's not that hard. Give CDW a call. You'll need to setup a volume licensing agreement, which means buying at least 5 licenses, but there's some $10 licenses you won't use if you need filler. Also, this is an upgrade license, you need an underlying windows license on each PC to upgrade it.
Too much $ for me, I'm just using home/pro.
https://www.cdw.com/product/windows-enterprise-ltsc-upgrade-...