There was a great one at TrainzItalia, but it seems to have disappeared. It was one of Jango's creations, and was being updated, but he has sadly passed away, so we may never see the updated version. There are a couple on the DLS I have downloaded, but I have not tried them yet, so cannot comment:
<kuid:233896:100987> WHITE PASS & YUKON RAILROAD V2
<kuid:233896:100988> WHITE PASS & YUKON RAILROAD V2 - Default
<kuid:233896:101154> WHITE PASS & YUKON RAILROAD V3
<kuid:233896:101155> WHITE PASS & YUKON RAILROAD V3 - Default