Dont know why I didnt mention this earlier, but I found this company
a while back while looking for a two part cold cast urethane in
various durometers for making custom motor mounts. Figured the same
stuff could be applied to pressing applications.
Look under their molding compounds, you can see the products that
could apply to hydraulic pressing and the various durometers it comes
in. With this you could easily make some pretty trick urethane
pressing pieces by building some sort of mold to pour it in.
In addition, their rigid casting line might be used to make the
rigid portion of two piece molds, although I dont know how well it
would hold up over time.
Anyhoo, just thought Id share this, if anyone tries it, please post