Ultimately, you have five options.
One, find a modem to connect electronically to a bulletin board.
Two, find a PC computer that has a 5,25" drive.
Three, find an Apple II with uni drive capability.
Four, find a Mac with 5,25" and 3,5" drives.
All of the above options require some form of hardware that is hard to find, even for me beause of the volume of stuff in the storage shed.
Five, because you have two drives, you could make backups and mail one off to someone willing to dig out their old hardware and email files back to you.
Ji˜m