I got mine at home depot, I had a hard time finding it just because I didn't know what I was looking for. If you've never bought it before checking these out may or may nor help. http://www.google.com/search?hl=en&...l=&oq=&pbx=1&bav=on.2,or.&fp=563c33928d93abad
just get an idea of what you're looking for, calling around and just asking also helped out.
Im in england and we dont have walmarts here but general automotive places will have them just ask at the counter and they will show you where they are. Usually with all the spray paints and anty rust stuff as its used for body work. The body filler (bondo named brand but any will do) should be in the same section.
Any place you buy auto parts from should carry resin and fiberglass, also look in the phone book under auto suppliers/autobody. There you can buy supplies in bulk lie rolls of fiberglass and large size bottles of resin. It might be alittle more expensive than going to wallmart but you wont have to go back as often for supplies.
SInce you seem to be having trouble finding things, make sure you don't outright foreget something either. Like gloves, respirator, safety glasses, or additional hardener and mixing cups.
haha thanks guys, i just wanted to make sure where they were.. when i had to get the resin i was in such a rush.. maybe thats why i couldn't find em? haha