I typically make sauerkraut in Le Parfait 1.5L / 2L jars. They're easily purchased at this end, and I also bought a glass drill, grommets and airlocks (see images below).
But the issue has been what to weigh the kraut (cabbage) down with and here's a solution! It's a Pyrex 'milk watcher'... Perfect for fitting through the 80 mm mouth of the jars.
And so an example of it in use (a bit cloudy because inadvertently I disturbed the contents, but it's in there...):
And an example where it's not in use, but it's hard to tell - not forgetting I promised to post a red/purple sauerkraut ferment...:
The quantities mentioned before apply: 2% salt per weight of cabbage and then 2% brine solution to cover the ferment.