Are there any signatures where the recid (v) is equal to 29,30 (or 33,34 compressed)?
For random signatures, it is an extremely low probability event. Around 1 in 2128, so it will likely never ever actually happen.

However, you can easily construct a valid signature that has one of those, and the recovery algorithm will give you an actual public key for it. It just won't be a public key anyone actually knows the secret key for.