Can I get a straight talk sim card not online ?

Hi everybody :)

I'm now running on the 30$ unlimited data/sms 100mins T mobile plan and would like to try the 45$ straight talk unlimited plan.

But I'm running out of time and would avoid ordering from walmart.com or whatever.

So can I buy the straight talk activation simcard kit somewhere ? Apparently wallmart don't. What about CVS ? Target or anyone else ?

Thanks in advance have a great day :)