Many Electronics stores sell 2-sided hook-and-loop tape in a roll for use as wire and cable ties. You cut off the length you want and overlap the ends. It's about 1/4" wide, and would probably work fine for a lightweight attachment.

You can also buy hook-and-loop tape by the foot in various colors and widths here (and probably other places online, too).

I ordered some 1" inch red and both 1/2" and 1" black from them and am quite happy with the quality of it. Fold one end over twice and you have an instant "pull tab" to open it.