Has anyone purchased an individual short term disability plan?

I do have STD coverage through my employer, but, the coverage is kinda cruddy and wouldn't give me a lot of financial support for new parent leave. I'm trying to find an additional individual plan that would provide a better cushion.

Sweetie and I are planning to start TTC sometime in the next few months. I've heard that if you purchase an individual STD plan, you need to have it before you get knocked up -- so, I'm trying to shop now. However, I'm having trouble finding information about which companies even offer individual (rather than group) coverage at all. Any leads?