Hi Len,
Disclaimer — this is not legal advice. Different mixes of the same track are still the same underlying work. However, the reality TV library has no legal claim on the lyrics to your tracks, if the vocal versions were not part of the deal. So, the issue is whether the versions with lyrics are severable from the instrumental versions of the tracks.
Shopping the alt versions without the exclusive library’s permission is a potential minefield, but situations like this can be worked out by agreement. If I were representing you, I would approach the library and attempt to negotiate an addendum to your contract that would allow you to pursue other options with the vocal versions of your tracks.
There are a number of ways that it could play out, which I won’t get into here. It can be done, however, if handled properly with the library’s consent.
Bottom-line, get it in writing before you proceed.
Are you back on the east coast?
Cheers,
Michael