OK. The torrent above is indicates the System 7.5.3 CD-ROM retail version to the free version. I think the Apple has been developed the CD-ROM if the System 7.5.3 CD-ROM package is purchased. I got this on other websites, this one is fully free. Unfortunately, this CD is now free (formerly is now commercial, later it's now free of charge) now. I will unable to post this on Rapidshare, so you need relief, this CD contains the free System 7.5 Version 7.5.3 and also the programs like HyperCard player, QuickDraw GX, PowerTalk, and OpenDoc 1.0.4.
In the meantime, this torrent has the installation images (System Software only). This one contains 19 images (Before You install disk, 2 Disk Tools disks and 16 install disks).
If you like System 7.5.3, you need to update to 7.5.5, free of charge in Apple. OS 7.6 has available in my RS, but due for many reasons, 7.6 installer only works for PowerBook 3400 Series.