Inexpensive at $15.99 and shipping is free. Perhaps it is a bit unsightly, but should do the job.
The problem I see is that the traces will be up, not down against the case, which will expose them to more potential damage. If it was make the other way, the case that the SD card goes into, would be flush against the case vs the metal against the case and the trace up off the case.
If I can find an elegant enough solution to use with my phone I'll get a 256GB SD card.
Been waiting for 128GB cards for an ETERNITY now, tired of the wait - I was amongst the first in the world to get a 64GB card, part of the reason my YouTube video showing it working in the Galaxy S2 got so many hits (more than a million last I checked).