I made this spoolholder, which mounts on the standard Creality bracket. it will hold most spools of different sizes.

Simply glue the 2 halves over the standard Creality spool holder, slide on your spool and screw on the nut. 

i printed it in PLA, with 3 perimeters/walls and 15% infill. But feel free to use you own material and print settings.