At the time I'm writing, the 0.18 RC are available on this page.
But as NormandC told 0.18 is under release process, and official installers should be soon available (despite on my side, I prefer to use a Zip archive under Windows).
Don't be that harsh with yourself. Handwriting some SVG in Notepad is a nice evidence that you're ready to fight some obstacles.I have considered something like openBrain’s option #1, and now you have encouraged me to try it. I ruled out #2 as I’m not a programmer, but a middle+ age physicist.
I think you have to weight both options according the occurence of your need.
If you have tons of file to import, maybe #2 is worth spending some time struggling with Python as it will lead to a more "automated" process. Starting from an existing importer as SVG or IDF should make that reachable.
Oppositely if you don't have so much files, option #1 is indeed probably easier to implement. I'm not expert but maybe Matlab/Octave can be programmed to directly generate SVG format. On my side, I would have do it using sed/awk commands using eg. this Busybox build for Windows. If you're interested in this latter solution and provide one of your point cloud file, I can have a look.