There's a CVVC reclist available here which only has 34 recordings for one complete pitch.
wastelandutau.neocities.org
You can get the corresponding BGM here.
wastelandutau.neocities.org
Before you start recording a voicebank, I highly recommend doing vocal warmups to prepare your voice for the whole session. Here's a quick video you can follow, and there's plenty more if you search for vocal warmups on YouTube.