Hi, MaulMaus,
After an hour of measuring my connectors, researching different hoses and looking in the back, he finally pulled out a couple of different hoses that looked like they might work.
At first we were looking at 1" OD (outside diameter) flexible ducting hose. It was very light and very flexible and relatively inexpensive. It's the black one to the left. It doesn't come any smaller than 1", infortunately. It also looked like it could absorb paint really well.
Then, as we looked closer, I noticed that Zam's tube actually goes inside the reducing bush, the part that sits on top of the threaded nut, not over it, which turned my 1" OD into a 3/4" OD.
So that sent him off into another search and he brought out two different hoses: the blue one that I actually ended up working with and another one that looked really cool. It was a silver and black U2 Vac hose 3/4".
I actually really loved the silver and black against the connectors but it's certainly a deviation from the model. So the guy was so nice and decided to let me have (for free!! Yay!!) a few feet of each tube. He had them in stock. He can order more of the silver and black. The blue tube he said he's had sitting here for years and years and brings to trade shows as examples. I'm not sure if he can get more of it but I'm sure he'll let you have some that he has there. He must have had like 10 feet of it.
Sorry that was so long and convaluded.
His name is Chris Grubbs (407) 843-8190. He knows exactly what we're trying to do. I showed him pics of the Zam hose. Poor guy even sliced a piece of flesh off his finger as he sliced a few feet of the hose for me. I felt so bad.
So, really, the short of it is, it depends on what size you need. I'm not sure where you got your greeblies from or what the diameter of your bushing is. I got mine from JDFett. That would depend on what size you need so that's why I gave you the two options.
It was nice connecting with you and please let me know of your progress!