There is this kit that they may send you:
http://www.zrtlab.com/vitamindcouncil/home-mainmenu-1.html?page=shop.product_details&flypage=flypage.tpl&product_id=4&category_id=1There are two options to choose from:
- one test = 65$
- four tests = 65$ too
So with the second option, you get the price that is significantly lower than in-lab testing. However I know nothing about the accuracy of this test, and what are the shipping costs. And you have to look for another 3 people that want to test for vitamin D, and when you start asking, everybody will consider you crazy.
What I would advice is to look for another testing facility - there may be another one, although it is common that there is only one in one country/state. You might want to remember about getting tested this when you are on vacations somewhere. And yes, everybody will consider you crazy, but don't care about, I certainly don't.