I honestly think you shouldn't factor in "are they into what I'm into" when searching. Just find someone thats right and stick with them for as long as its still worthwhile. And you never know you might bump into one that has already watched Magiranger or Super 1. Like my little (err big) lady here.
You mean to tell us that you actually don't enjoy anything other than Power Rangers and Sentai? If that really is the case, then I think you should probably be on the lookout for more hobbies rather than anything else.
To answer your question, though, I would scour any local anime conventions that may be coming your way. I honestly can't think of anywhere that you're more likely to find chicks who enjoy watching Japanese prettyboys in spandex fighting monsters.
basically wear, wait for some girl to comment on how much they like your shirt and that's pretty much your in, assuming you do know how to talk to women
basically wear, wait for some girl to comment on how much they like your shirt and that's pretty much your in, assuming you do know how to talk to women