If you’re in the US try Ace Hardware? If not you’re not reach out to me with the details of that wingnut and I will swing by my local Ace Hardware and look for you.
Man I wish I still had a way to go back to my SoCal connect. I would definitely jump on a spare Hitachi/Toshiba tube. I use to live in Victorville CA, and would all up and down the different areas of SoCal back in the mid 2000's.
Sup @Segafan1985 can you talk about where you got the all net harness for that reader thing from please? I got the same panel and would like to utilize it one day.