You are probably already aware that most people just use cheato because many of the types have a risk of going sexual and releasing spores everywhere. I personally would love to have some other kinds as well.
I have a small amount of caulerpa prolifera (google some images). It is a very nice thick blade grass that looks familiar to sandy areas. Grows well, easy to manage. Eaten readily by tangs and the like. Left alone by non-grazers. I am near downtown, probably will not make this month's meeting. I can grow some for you if you'd like.