This is Steve Plimpton. So far as I know there
is no official DYNAMO website or download location.
The code long pre-dates the popularity of source code "repositories". It
was developed by Daw and Foiles (mentioned in the thread),
two or the originators of EAM potentials.
That said, I do have a tarball I can send you
if you contact me via my work email - I'm at Sandia Labs.
I'm not sure what DYNAMO version it is.
As was mentioned, we put many DYNAMO features
into ParaDyn which we wrote to allow EAM models
to run in parallel, but that was in the 1990s
and DYNAMO may have evolved since then. And as was
also said, the parallel LAMMPS MD code includes the
original EAM (a la DYNAMO) and a variety of EAM
variants, including MEAM (modified EAM) and some
angular-dependent versions. LAMMPS is actively supported
and has its own mail list where you can ask further questions.
Hope that helps,