I have the "Legacy Recovery CD" image I got from some website. Not sure I can link to it here. But I can grab the 7.1.1 installer files off the disk and PM you those. 
I believe they are all stored as Disk Copy drive images. I would hope you have another Mac to create the disks with as you can't write/read 400/800K Mac disks on a PC due to differences in floppy drive hardware.
Not sure if they can be installed from 800k disks though. My SE is a SuperDrive so I won't have that problem.
EDIT: The installer disk images I have for 7.1.1 are for 1.44MB sized disks. Not much I can do for you on that one. I can however get you Mac OS 7.1 it has a 800k version that will fit on 800k disks.
I believe they are all stored as Disk Copy drive images. I would hope you have another Mac to create the disks with as you can't write/read 400/800K Mac disks on a PC due to differences in floppy drive hardware.
Not sure if they can be installed from 800k disks though. My SE is a SuperDrive so I won't have that problem.
EDIT: The installer disk images I have for 7.1.1 are for 1.44MB sized disks. Not much I can do for you on that one. I can however get you Mac OS 7.1 it has a 800k version that will fit on 800k disks.