If you love it and it make's your day oh so great, snap a pic and "I made one" ;)
Should fit most spool's. If not, it only takes a few minutes to print and try :P I use a ton of these myself.
I'm not opposed to a tip as well! ;)
The "Fila-Clip" is the MAIN one I use myself. It's a bit smaller, still hold's great, and has a nice tight latch on the spool. These are the Blue one's in the picture.
The "Fila-clip-Longer" version might work with 3mm filament. I don't use it myself, but I will upload it in case someone want's to give it a shot. It also has a little wider clip, if needed. These are the red one's in the picture.