Are there any bike shops near you that carry, or better yet, specialize in recumbents? If not, there may be someone around who will let you try theirs.
You might try adjusting your wife's trike to you just to see if that might work. Depending on what interferes where, you might need to try a bike or trike with tiller steering, superman bars, or some other setup. Recumbents have a lot more variety when it comes down to it. That makes it a little harder to decide what works, but easier to find something eventually.
I would like to try a bike with underseat steering (USS) and see how it feels. I'm happy enough with the tiller steering on my bike (and velo), but I think I would like USS better.