I believe most Asian vegies need a long hot season? you may need to use black plastic mulch or some other season extenders? Try Kitazawa seeds, they have lots of great asian vegies.

http://www.kitazawaseed.com/index.html

Evergreen seeds has 8 different cultivars of Wax Gourd/Winter Melon/Tung Qwa (Benincasa hispida) including a small 65 day cultivar from Chia Tai (Thailand) (Thai Small). Some cultivars of wax gourd ( there are well over 30)go over 50 pounds. Thai Small only goes 2-3 lbs.
Kitazawa has 4 cultivars,and a similar 70 day cultivar named Balloon at 2-3 lbs. Note that if you go to Kitazawa look under Gourds not melons.

Here is a link that might be useful: Wax Gourd