While I have two floppies with System 3.2; I don't have a 3.1.
I do, however, have a couple copies of Mac OS 7.5.2. One on a "Power Macintosh 7200/75 & 7200/90" OS restore disc, one on a "Power Macintosh 7500/100 & 8500/120" OS restore disc, and one on a "PowerBook 5300/2300/190 and PowerPC hardware upgrades" restore disc.
They are presently in storage, but I just became unemployed, so I should have time over the next couple months to organize my collection.