I do this as well. Check my reproduction covers in my box account link. I also have about 80 regular covers converted into this format.(not in my box account)
Ok, I'm converting all the covers from bmp(20mb) to png(7mb). Already converted about a third of them, so I will upload my mediafire link in a day or two.
There were more covers than I thought there was. But, yeah...here they are.I left the Reproduction covers in my box account though.https://www.mediafire.com/folder/wdi9wvlol9wkl/SNES_Hybrid_Format
For my first 12 or so covers that I printed, I left the white border around the snes logo. After a few days I got tired of it and re-printed the covers without the borders. In retrospect, I would most likely use a different snes logo or symbol on the very bottom of the spine. The moral of the story is, find what you like and stick with it. After you make dozens and dozens of prints, your married to the format you stuck with.