Later, as I read and answered the posting, I read a post from shokolada (her thread "New indoor dumpster pictures"). There was a picture of some 'home-box', she used for playing.
And this made me think if you had room and opportunity, you could build your own compactor. That is - some box (robust and preferably with a metal plating) and some moveable part to compress you. The important part here is that the compressor will never get deeper than a certain level, so increased compression will depend on how much you fill the space.
Of course you will start making sure you can be in the compressed room. And that there's nowhere to have parts of your body locked up. Then add a bag of the garbage type you fancy and try again. Add more bags to get the sensation you desire.
As you're at it, do make yourself a list to combine pros and cons with different types of trash and different amount of bags. This can be useful if you e.g. usually uses four bags, but 'today' you just want a quick hug and uses ..... 1, 2, 3 bags?
Do consider the timeframe - are you to be compressed and kept at a compressed level? Or to be repeatedly compressed and released? And how long will the session be.
How will you eventually 'escape' your compactor? As with any selfbondage type you should have multiple releases - the final being inviting a friend for coffee a few hours after your expected release.
Gathering garbage for such a compactor will at least make you able to avoid getting stabbed to death as someone filled a broomstick into the compactor. Still do make sure not to have any harmful stuff in the garbage.
TeaSer