In unicode there are lots. How about:
- Black left pointing index: U+261A ☚
- Black right pointing index: U+261B ☛
- White left pointing index: U+261C ☜
- White right pointing index: U+261E ☞
just for a quick example. Heck, there is a whole range dedicated to various kinds of arrows (2190–21FF), which can easily be used as bullet points. I guess you can start to browse unicode code pages - there are a lot of characters out there, though. I expect you'll have a hard time finding everything anybody might use.