Sorry for the delay here, I received my Sony SW3 adapter from shapeways here:
https://www.shapeways.com/product/DP...atch-3-adapter
The adapter fits quite well, the SW3 itself is pretty snug and I was originally worried about breaking the 3D printed adapter, however it has held up so far. You will, of course, need to find a 24mm watch band to connect to this adapter. Thankfully, I also had a Sony SW2 laying around, which just do happens to have a 24mm band! See below:
Which leads me to my main issue with this adapter... It's just plain BIG! I don't fault the creator on this one, but I simply have very thin / small wrists and this adapter just looks gargantuan on my tiny wrist

.
For those that aren't so "slender-wristed", this adapter may actually work well. There are some slight gaps between the adapter and the SW3, but they aren't too noticeable at a glance, at least.
For a first attempt, as I ordered this adapter back in October 2015, it's a great start and a hell of a value compared to what band options you can find elsewhere for this watch.
I have noticed that some bands have been showing on eBay if you are still looking for one... However, they aren't cheap! So be prepared for that!