Small arboreals?

[Mimstrel]

I love the look of ATBs - their slender build, the way they drape and coil themselves instead of just balling up like ETBs seem to (seriously I don't understand the appeal of ETBs, they're literally a green ball on a stick... no offense to those who love them; to each their own!) but for a couple of reasons wondering what is out there, if anything, that might have a similar slender build and arboreal habit but be smaller in size/housing requirements...without requiring frogs or lizards as food. Rodents and inverts I can do, but I don't have a good source for lizards or frogs.

Currently I have a corn snake and three Kenyan Sand Boas. They are all great snakes to handle, though the corn can be a little snippy (feeding response) in his tub. I'm interested in a display snake, but I also recognize that I'm not super experienced as a snake keeper so if there are species that otherwise fit, they may be above my current skill level and/or budget and may need to be a goal snake.

I have come across Indonesian tree boas, which are lizard-eaters, almost always wild-caught (there are circumstances where I would be okay with wild-caught, but I prefer CBB), and accounts vary as to how well they switch to eating rodents and whether doing so might be bad for the snake.

Another group that I've come across that have some slender arboreal species, are cat snakes and/or cat-eyed snakes. But it seems like there's not a lot of specifics on whether there are small species available, and also some of these seem to maybe be more venomous than others?

Thanks for any advice!