Flared magazine well extentions are mostly appropriate to pistols that use single stack magazines. Pistols like the CZ 97 that use dual-stack or staggered magazines have a built-in taper to the top of the mags that makes inserting them easier in a hurry. Flared mag wells benefit competition shooters more than casual shooters, and since the CZ 97 isn't used that much in competition, there's even less demand for them.
And, no, I don't know of any, but I haven't really been looking. If you find something on this, add it to your post so others with the same question later can benefit from your research.
Scott