I also need this. I'd buy the kit but shipping it is ridiculous and I can't support smokerstore anymore. I think it's healer to buy a whole clone than the tubing kit plus shipping. Gah!
My gs2 came with some but here for the posts. Not the center air hole afaik
Actually unless I moved parts to the authentic kit the old spares kit contained items like this. Take a look. - they've since split it out to two kits I guess based on greed. Why give it all away for the low low price of $10 when you can charge $10 alone for some plastic tubing!
Here's my authentic spares kit- not spares. They called it the tune up kit or something. It has six plastic tubes. This kit was a universal between devices. So I think the plastic parts are sleeves for the posts. Not for the center air hole. K need to try to fit it again.