Make your own cushion! I bought cushion foam from eBay, then cut it to fit my favorite chair (the foam I bought is much thicker than the original cushion). Then I cut a deep groove in it so I could sit without having my Aneros touch anything. Then, using my unmanly sewing knowledge, I made a custom liquid resistant cover out of a cheap fleece stadium/picnic/emergency blanket...with a modification for the groove in the cushion. ...It's fucking awesome! You really should make one for yourself. The foam isn't too expensive and you don't have to be a rocket scientist to sew a makeshift cover for it (it is VERY time consuming to do by hand though). Then you'll have MANY more options for Aneros sessions! Enjoy! =^_^=
I have been doing basically the same thing, but I bought a round blow up doughnut to sit on. I think they're originally made for people with hemorrhoid problems, but works perfectly for a "sit in a chair " aneros session.
Doesn't such a design cause hemorrhoids?
i did this for a while using the same tool, the inflatable ring to sit on. It wasn't really that great though for me for some reason.