Well, my answer above notwithstanding, let's look at this another way.......I don't think there are many that will work anymore because so many are set-up for electric power. You need an airframe that has a long pipe tunnel already set-up.

The Focus and Evo are two. Not sure if the Focus is still available. I think the WistModel Prestige and Bravo are a pair. No wait, I think the Bravo is electric only. I think you can get the CA Models Genesis and Visa (The Hyde designs) constructed for wet power. The EF 78" Extra; but I had trouble with mine so you possibly may have problems too.

Now, if you have some building knowledge, any electric can be converted to wet power. You will need to construct the pipe tunnel and reinforce the area around the firewall. These are not tough changes but you should know your way around composite materials a bit so you can make things strong but keep them lightweight. Should you decide on an electric to gas conversion, sand the composite shell inside and add carbon cloth with epoxy. To make sure everything bonds well, inflate a balloon and make sure the balloon covers the carbon cloth firmly against the fuse