Ecolage.com has 1 gallon moonflowers, and they have a search feature. They are the only online mail order place I've bought from, but there are others. I use froogle when I'm shopping, you might try that and see if you can find the plants you are looking for.

ara,

For next year, get a select seeds catalog. Here's their website selectseeds.com

They sell collections of plants as well as seeds. They are sold out for the season, but they have a lot of moon garden plants.

I would try ebay since it is kind of late in the season.

HW