I'll try a pharmacy NOT local to me first, not that I look like the kind of person who would use a needle for anything BUT refilling! hahahaha Thanks for the tips!!!!
I just go to Wal-Mart Pharm and ask; no big deal.. If anyone says anything, just say it's for a science project, but I've never had them say anything other than "How many do you need?".....last ones I got were 18 cents ea...

I just got the 18 ga to fit into my carto. Hubby sent me a You Tube video demonstration. Tried again and still could not get needle in it. I used the end of a long safety pin to pop the seal and wallah...my blunt needle fits. No mess. 