Anyway, I decided to make my own. They are (very) easy to make, are relatively inexpensive, and look great.
Step 1: Stuff You'll Need
PVA glue or lighter
Instead of a paracord you can use the 'handles' of a drawstring gym bag, or shoelaces.
And instead of a carabiner, a key ring would work too.
Furthermore, instead of a cord lock, you can use a large bead, however, those do not hold the whole thing very well. (For one of my holsters (see blue one in images), I just use some more paracord, to make a slider, which holds it pretty well.)
Step 2: Step 1
(Starting off nice and simple)
Step 3: Step 2
Step 4: Step 3
Does that even make sense?
It is difficult to explain, but if you do it wrong, you will notice, as all the 'lines' will be going in the same direction.
Step 5: Step 4
Step 6: Step 5
You should see two small loops. Thread the ends of the two middle cords through these - one in each loop, ensuring they don't cross or overlap.
Step 7: Step 6
You may place your yoyo in, and see how the holster will look. If you are not happy with the 'woven' bit, you can make it longer or shorter.
Likewise, you will want to make sure you have a good length of paracord left. Around 200mm should suffice, but will depend on the size of your yoyo. I made mine big enough for my largest yoyo to fit in.
If in doubt, make it bigger, rather than smaller.
Step 8: Step 6
Step 9: Nearly There
Now, put a splodge of PVA glue on the ends of them, and the end of the single knot.
An even better way to 'close' them, is to melt the ends with a lighter- which is what i did. This way it looks much neater, and makes it waterproof, but it can disrupt the colour pattern, and one would have to be careful.
Step 10: Nearly...
Step 11: Done!
Hope you got it. Would love to see how yours turned out!