Not to be a jerk, but if ya snooze ya loose.
A lot of people had warning about this coming. The reports that Straight Talk was no longer offering the At&t SIMs appeared on several websites. The news was even mentioned on the website you're currently on. I seen the news and I immediately went to walmart.com and ordered enough of the SIMs for all the members of my family and a few spares. At that time, they were already sold out of the micro cards so I bought a cutter and paid $15 bucks each for the regular sized SIM cards. I'm waiting for the going price to reach $100 and then I'm selling my extras off so that I can cover the cost of the cards I'm using, the cutter and couple months worth of straight talk service.
If you're wanting one, let me know, I'll even cut it down to micro for free