I ran across this brand of IR controlled motorized curtain rods a while back,most likely sold under a couple of brand names, but take a look to see if these might meet your needs. You could "Google" the model number "CL-800" & see whom else might sell them. Kits come with wall & ceiling mounts.http://www.powercurtain.com/product1_800.html
This site has some great photos showing the kit.
6.5' - 10' $195
10' - 13' $285
Some say on this forum, that curtains will ride too far from the screen to mask it well (due to stackback). Read about AVS member Vern Dias's build & he placed another track closer to the screen surface for the vertical masks to ride in & provide a connection 'tween the curtains & that 2nd trach to pull the masks along as the curtains move. See this AVS thread for text @ post # 10http://www.avsforum.com/avs-vb/showthread.php?t=764892
Photo of Vern's double curtain tracks;http://webpages.charter.net/tvdias/Rt_Masking.jpg
Here is a company that makes AL curtain tracks;www.recmar.com
An eBay seller named "curtaintrax" also sells their products.
The AVS Forum is such a great place.
Maybe Vern will check in & add more details about his great build...