I was finally able to snag one last time after being alerted by this stock script i wrote, I no longer need it so if someone feels like adapting it for their uses here you go:
#!/bin/sh
curl -s 'https://cdn5.editmysite.com/app/store/api/v17/editor/users/134737747/sites/969934699484555394/products?page=1&per_page=50&ids[]=1&ids[]=5&visibilities[]=visible&visibilities[]=hidden&include=images,category,media_files&excluded_fulfillment=dine_in' | tee /tmp/concerto.json | jq -r '.data[].inventory.total' | grep '^[^0]$' && echo 'concerto in stock! https://erstwhile-technologies-7800.square.site/' | sendxmpp you@example.org
Needless to say I can't wait for the Concerto to arrive.