Not the same as a popsocket, but take a look at the sinjimoru magsafe wallet. It holds 3-4 cards and includes a finger loop which gives good grip for one handed use.
The downside is the stand is only functional in landscape.
Works for me. https://www.amazon.com/dp/B099JZD87B/ref=cm_sw_r_apan_i_FVBHGDF0C5M49TQ34JF1