In my area of research there is this old PhD thesis cited by everyone, which is inaccessible. Due to this, recent surveys even question its validity.
Recently, I contacted the authors and received their original document. On a cursory glance the techniques are sound and the result seems valid. Assuming that it is correct, I definitely think that this result needs to be published.
Both authors also expressed interest in a publication but I do not expect they will put much effort into it, given that the thesis is old and the student writing the thesis seems to have left academia. Moreover, the formatting of the result hardly matches what is expected by nowadays journals.
In what respect can I support the result being published in some peer-reviewed venue? Currently, given time, I would consider rewriting the result and sending it to the original authors for them to proceed as they wish. Are there any other options? In what respect would the result being published in some inaccessible thesis hinder its acceptance at a good journal?