I'm pretty out of the loop on modern shonen, but will nth the library suggestion.
I might be a bit biased, as my local library system is 3rd in the country for circulation (behind NYC and Cincinnati of all places) and 5th for visits (behind the LA area and NYC) but I've never had an issue finding a manga through them.
Depending on the area your story is set, you could easily send the dad to the library.
ETA: the link is to the ALA website, not my local library system, to be clear.
no subject
I might be a bit biased, as my local library system is 3rd in the country for circulation (behind NYC and Cincinnati of all places) and 5th for visits (behind the LA area and NYC) but I've never had an issue finding a manga through them.
Depending on the area your story is set, you could easily send the dad to the library.
ETA: the link is to the ALA website, not my local library system, to be clear.