There definitely not many cultivars of our native beech, but I am aware of 2. Fagus grandifolia 'Diamond Bark' is a named selection from Ferncliff Cemetery in Springfield Ohio. Dannaher Landscaping in Ohio has a weeping form they have introduced called F. g. 'Cameron'.

Dannaher has both in production and on their availability list.

http://dannaherlandscaping.com/plant_list_a-m__updated_february_2013

Attached is a pic of the original Diamond Bark Beech (TM) I took in 2010 at Ferncliff Cemetery.

Thanks. I promise I didn't just make that up about there being no cultivars available. I could cite about a dozen university websites that say the same thing. Hopefully there will be more cultivars available in the future.

-Forrest