I don't know anyone who has a printer capable of printing 7.5 min maps on-demand. That's a job for a print shop. Most SAR happens from day hikes and other light recreation, not multi-day expeditions where you can reasonably justify extensive setup like that.
My recommendation is to take an old phone, make sure it's charged, and throw it in a Ziploc in a back pocket. Then stay on-trail, which you should almost always be doing anyway.
Capable of printing to-scale? No. But I've printed a fair number of USGS 7.5min quads on a standard Brother laser printer. I print them double-sided, with the top half of the map on one side and the bottom half on the other[1]. They fit that way at about 1/2 scale, which is still eminently usable. Perfect for day hikes and other light recreation. And guaranteed not to break when you sit on it in a Ziploc in a back pocket.
Sure, use your phone with offline maps as your primary, but a printed backup map doesn't require anything special or expensive.
[1] With an overlap strip that is printed on both sides, thanks to plakativ[2].
[2] https://gitlab.mister-muffin.de/josch/plakativ
> ...7.5 min maps...
This is the second response in a row where you've read something I wrote and responded to a very specific thing I did not say.