Wizard Collector plate art What series is it? Dungeons & Dragons ? Tolkien

Huge neat oil painting that looks like it was done for a collector plate Know the artist but really curious as to what series it came from and the title of the plate

I have got it traced to the bradford plate exchange in Niles Ill but they are not responding to emails.

Very large acryllic on canvas mounted to foam core about 3 feet square
The scene is from Lord of the Rings and Herring did books covers for Tolkien but the WIzard's cloak is the wrong color

Alo ohave it now up for sale or trade as the new house has less wall space - I've enjoyed it for 15 years