I agree with both responses, although I would personally recommend that you lean toward a school teaching boxing/kick-boxing/muay Thai.
It would be a good idea find a Brazilian jiu-jitsu school that also teaches boxing/kickboxing. That way you're getting everything you need.
There ARE videos you can purchase to help. I personally recommend Matt Thornton's "Functional JKD Series II".
Check that series out here: http://www.straightblastgym.com/videoinfo.htm#JKD2
That may seem a little pricey to you, but considering that it covers the whole enchillada, it's really not a bad deal at all.