Bitsavers and deepblue have all the tape distributions, but not D6.0A (which is the one that is ready to rock'n'roll under Hercules).
I took the D6.0A media, configuration, and PDF of an old MTS Q&A page and put them up to as a stopgap. We'll find out if my ISP meant it when they said "There are no set limits on the disk space or data transfer (bandwidth) that we provide in our hosting plans."