Right now, MicroCenter has this
Micro Center 32GB SuperSpeed USB 3.0 Flash Drive US $3.99. All you need is to either order online and/or just go to your nearest local Micro Center to buy it.
If you need a smaller and slower version, perhaps this
Micro Center 16GB USB 2.0 Flash Drive US $2.99 will just do. TBH, I would just get the former.