If you're looking for a micro SD card extender that can be mounted to a case or the Turing Pi v2's I/O shield, this one is a good option: https://a.aliexpress.com/_mKRKCLh. I purchased a couple and received them yesterday. Haven't drilled a hole in the TPi v2.5 I/O shield yet, but it should fit perfectly. The ribbon cable is long enough without being too long. I need to remix a 3D printed shield with the appropriate hole.