Wow, I doubt it, since that's going to brutal on your HO rolling stock not only on the outer curve but also on the even sharper inside curve. However, you could have someone custom build one for you, if you are unable to build your own turnouts.
I don't model in HO, but, for comparison purposes, I have an N scale curved turnout that Chris333 built to my specs: 10" radius outer curve and 8-1/2" radius inner curve. If I'm doing my math correctly, that would be the equivalent of approximately an 18-3/8" outer radius and a 15-5/8" inner radius in HO. It's tight, but, thanks to Chris' fantastic handlaid track work skills, it works well. I'm not sure I'd want to go much sharper, though.

Hope this helps,
DFF