There's a poor pic of the Lockhart tartan kilt here http://www.clanlockhart.org/

There's a pic of the Clan Chief here http://www.clanlockhartsociety.com/ with probably the Lockhart tartan, again, a poor pic.

Often Clan webpages have a gallery with good pics., but it looks like slim pickin's for the Lockhart tartan kilt.

This site has some kilt pics but not sure they are, in fact, Lockhart. http://www.lakegeorgenewyork.org/lockhart.htm

Sorry if you've already Googled....I got curious.

Ron