Rock mold for Tunnel Portal

Does any one know of a good rock mold for a tunnel portal. I have those Giant Lionel portals but I don’t like them so any advice would be great.

Kevin

Check Scenic Express, they have some excellent O Scale portals.

Here’s one I made using molds from Woodlands Scenics on a 1x4" frame.

[View:http://cs.trains.com/TRCCS/themes/trc/utility/

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wyomingscout