I am pruning my trees. I do know know the name of the variety but they are pure white and reach the height of approximately 20 ft. Easy to root from cuttings.
Different varieties you can find:
http://aggie-horticulture.tamu.edu/databases/crapemyrtle/crape_myrtle_varieties_byheight.html

I can fit about 12-15 cuttings per small padded envelope. $1 each cutting or $10 per envelope + $5 shipping.
PM me if want any.