Rich330P4
Hello & Welcome to the Forum!
Your MPC era Berkshire would have been paired with a Lionel 736W whisteling tender.
Earlier Berkshires were paired with a Lionel 2046W whisteling tender.
I imagine either would be just fine, unless you are a rivet counter.
As for replacement roadname, you will have better luck finding decals rather than silk screening.
Hope this helps.
Happy Rails!
dave