Just looking at the
parts diagram, it looks like it uses the same mounting points on the left side. You could probably drill and tap a hole in the crossbrace for that one. It looks like there's a couple extra tabs on the right side for it to mount to. You may be able to rig something up - I believe people were using zipties on the right side with the Byson hugger.
The
300's mini-hugger chainguard mounts on the 250 swingarm with just a couple extra holes. This one might not be too different either.
The Z250SL's trellis frame is obviously quite different, but the swingarm looks pretty similar (along with a number of other parts). If you wanted to go that far, you might be able to swap the whole swingarm in to get all the correct mounting points.