Went ahead and made the entry. In case we change our mind, we can always rename the new one to "5pb." which is still more correct than having the entries linked like before.
The 3 entries left in 5pb. are the only ones with the plain "5pb." logo instead of the 5pb. Games one, so I've left them linked to the company.
There are still some I couldn't verify (see the spoiler in
this post) so in case anyone owns them/can find a scan where you can read the text under the logo, let me know.