Thanks Shirley!

In case you missed her comment below, thank you so much to Shirley for sharing the following information for those who want to sew costumes:

If you want full-up then Simplicity has a Nativity pattern (I think around $8?):

http://www.simplicity.com/dv1_v4.cfm?design=4795

More casual - this site has ideas for dressing Mary as in a Nativity play:

http://www.ehow.com/how_11777_re-enact-nativity.html

While not specific to Mary, this site http://www.home-school.com/Articles/JessicaCostumes.html has ideas for making tunics etc

Thanks Shirley!!