If you have not heard of her before, you should check out her wonderful site of Christian art.

http://www.revelationillustrated.com/

You can purchase images or even 16 x 20 prints of many of them.  My favorites so far are:

The Tabernacle at Sunset
http://www.revelationillustrated.com/shop/tabernacle.asp

The Harvest
http://www.revelationillustrated.com/shop/Harvest.asp

The Covenant; Genesis 15
http://www.revelationillustrated.com/shop/covenant.asp

The Rapture
http://www.revelationillustrated.com/shop/image36.asp

You might also check out the "Revelation Illustrated" video:

http://www.revelationillustrated.com/Flash_Video/REvClip/20071016151954.htm