Just FYI the VAX/VMS (and Alpha VMS) ADA, BASIC, C, Pascal and Fortran
compilers can be found on the relevant CD images on VaxHaven. I've
tested each, since licenses for all are still part of the hobbyist
package, and a modern hobbyist license will work with the older versions
found on VaxHaven from the mid 90s just fine.
So if anyone just wants the compilers themselves rather than a specific
older version, that should work quite well for you.