well cutting a diagonal on the end is pretty simple. just need a way of heating about a 10 mm length to about 240 and then getting it out of the thing it was heated in. This stuff sticks to just about everything lol

A cheap hotend with 2mm metal tube might do the job if I could run it off a pc psu. And then sand it to exact diameter
Not sure how I'd get it at the right temp though.
I don't really do electronics.

But there's a market for someone who can !