What I am looking for with wmFights is a historical theology resembling the thinking of the Reformation, especially on the four Solas. Rebaptism is not a foundational Reformed teaching, is it? Of course there have been various heretical groups all along.
It is wrong to confuse anapabtists with donatists though. The latter rebaptized for a specific reason of the initial baptism thought invalid because of the apostacy of the priest. It was not a reflection of any theology of baptism being an expression of internal rebirth through adult faith, which we find in (ana)baptists.
Not exactly a fair request. Your church persecuted and killed those they referred to as heretics and burned their writings. It's like doing genealogy. I have researched numerous relatives and run into dead ends when it is in a county where the records burned. There are no eye witnesses left to interview and the written record is gone. Add to this that the people writing the history were the ones who destroyed the history and you end up with a difficult if not impossible situation to prove.
Nevertheless, if the 4 solas weren't taught by a single church authority after the apostles - it is still Scriptural. Jesus did not appeal to tradition to prove his case, he appealed to Scripture. Matthew showed how Jesus fulfilled Scripture when writing to the Jews. Paul praised the Bereans for checking him and how he lined up with Scripture.
Sola Fide is easily found. Sola Gratia as well and Solos Christos goes without saying.