Hello CK ,
Sorry for late reply to this,
Yes, it seems like RS Directory, Moset Trees, and SobiPro you mentioned do not have offer integration yet.
Regarding with your Jreviews question, yes all of their code is encoded, but if you would like to customize something, i think you have to consult with Jreviews, because look like you already compared with other directory extension, plus those directory extension is not suit with your needs in your current requirement.