The OE part is just a vacuum hose. You can get them at any local car parts store. Just cut off a part and the store can match it. You can also use a measuring caliper. As for me, I had some old fish tank air supply hose from my local Walmart. It has been holding up every since this fix. It's now August 2022!!
Thanks for the video! The hose on my 95 Mustang broke just yesterday. I’m have a terrible locating the line coming through the firewall. After watching your vid, I’m going to give it another shot.