Matt
I did a quick search here in the forum and came up with this:
http://www.aircraftresourcecenter.com/tnt1/101-200/tnt106_DisplayStand_Chung/tnt106.htm
Someone else mentioned somwhere that you can get acrylic rod at a Michael's craft store.
Do an advanced search in the forum for "display stand" and "plastic rod" and you may find more info. I only looked at one topic.
PS - If you search for "acrylic rod" you'll get about five pages of topics. I didn't wade through them, as many titles didn't seem to pertain, but maybe they do.
Hope this helps
stinger