Can I get a SIM card at a local store

Hi folks,

I'm planning on porting my number from Straight Talk (AT&T) over to Cricket in the next few days. ST has performed fine, but the abysmal customer service just bugged me the few times I had to use it. Also, I intend to switch my wife over when she goes off contract with Verizon, and I don't see where ST gives a discount for multiple lines like Cricket does.

Does anyone know: if I go to a store, will they give me a SIM card instead of charging $9.99 for it? My ST month isn't up for about 2 weeks, but I don't want to wait until the last minute in case there's a delay with the port (I have researched and have the correct ST info to provide to Cricket to do the port). Can I do the referral credit if I go to a store? I may just drive there and see if they'll let me take the SIM for $9.99 and then activate it online. I just don't want to wait for it to show up in the mail and get stuck paying for another month of ST if the port isn't done.

Thanks for any insight,

Gary