I dont mean to sound like a smart***, but... where you live, there are 2 HPE sites and 10+ HPE partners. Were I you, Id just try to get hold of one HP guy who listens to you, maybe even dug out via LinkedIn and plain ask if she/he gets you in touch with a tech guy or IT dept employee.
From my experience they are cool if you have such a request (please drop me such a screw). Most likely they are even fascinated hearing about your equipment and what you do and easily get you the parts you need.