I finally found a Blood Suckers vampire bat pen made in 1983!
Sadly the blood is dried up, but you can see how it works in the commercial here.
I got it and this other bat toy made in the 80s from BatGoods.com:
I got this bat with heart pin from BatinYourBelfry on Etsy here:
I got this Love At First Bite pin from Strange-Ways.com: