The middleman would be your supplier in this case. It's possible they have enough of a relationship with HP to escalate the issue with them. I would try have y

The middleman would be your supplier in this case. It's possible they have enough of a relationship with HP to escalate the issue with them. I would try have your org reach out to the middleman and see what they can do, suppliers, resellers and partners etc can be quite helpful in encouraging manufacturers to pay attention.