How about Christina Hendricks for Teela?
She's looks the part, AND she looks like she could be a warrior-woman. She's certainly got that great, Frazetta-like, statuesque build that the original MOTU concepts and art are based on, and she can certainly act. Mad Men is a great show.
THIS ONE SEEMS IDEAL TO BE 'SHOPPED INTO A TEELA COSTUME
As far as The Sorceress is concerned, I've gotta go with Jane Seymour because...I mean MY GOD! What isn't perfect about her?