That sounds about right. I'm not sure if that would have the zord footage. But you're on the right track. Most of the LR stuff is going to be on VHS. I don't think any DVDs of LR were ever released. I could be wrong though. The Disney seasons NS-JF will be easier to find. OO has a full season out in volumes. The others have at least some of the episodes.
http://www.powerrangersonline.com/epguide/
Perhaps my episode guide might help.
http://www.rangercentral.com
This site has another episode guide that will help if mine doesn't.
At least then you will know what episodes to search for on Amazon. I'm sure there has to be something out there you can find.