I believe the American Cancer Society will help you purchase a wig:
http://americancancersociety.org/docroot/home/index.asp
You might also check with your dr - see if he/she can give you contact information for local support groups - perhaps someone there will have a wig to donate or the other stuff you mention.
ACS could also give you information on local support groups.
I purchased a wig but found it to be VERY itchy, so I only wore it twice. (Have since donated to someone else.)
I bought very inexpensive bandanas at a discount department store (I think you might even be able to get them at a dollar store that sells clothes) If you fold them in half, lay the fold over the top of your head and then tie the ends behind, you can tuck the remaining point up under the knot, and it makes a very neat, tight fit. YOu can do the same but instead of putting the fold over the top of your head, put it in back and bring the ends around top and tie them in front, and fold the flap under the knot that way - makes a nice ethnic type head-dress.
Dollar General had some inexpensive very pretty ball caps a couple of weeks ago. When I got my bandanas I found some plain but usable ball caps that were like 3 for $5 at Walmart. Between my 4 or 5 bandanas and my 3 ball caps, I got through August to about Mar or April just fine. I stopped wearing them when my hair was about 1/4 inch long - after that I just used the caps if my head got cold.
Wishing you the best,
Tre