I have a nice Japanese-made Sekonic dual-pen chart recorder. It has some mechanical problems, including two plastic gears that split, and broken-off buttons. I'd like to get it going eventually, so will need paper rolls.
But the paper is a different width to your HP 7155B I think. Mine needs paper 265mm between pins. With 10mm hole spacing.
There are some things for which a physical, permanent record is much preferable. Not all that many, but some.