This is a combination of an SD card adapter holder (to hold a full size SD card adapter to micro sd ribbon cable extension) which fits the frame of an Anet A8, and a filament guide (remix of this filament guide: https://www.thingiverse.com/thing:2388379/#files ).
I had downloaded a couple different SD card adapter holders and printed out, but both were the wrong size for my adapter. I thought I'd make my own, and also add a filament guide that I had downloaded and liked (Thanks DerTechniker). I basically split the filament guide at it's mount and squeezed my SD adapter holder in between the guide and frame mount in Sketchup. (you can see the original filament guide in the picture)
The SD card adapter I purchased is roughly 35mm wide by 11.5mm high. I made the holder a little larger than my adapter to allow for print imperfections, so it is a little loose in the holder, but I think one or two layers of black tape will snug it up if needed.
I printed laying on it's back without any support needed. It fits the Anet A8 frame which is 8mm thick.