He spoke in Aramaic but there are no original Aramaic Gospels.
In our Greek class in the early 1970's, we worked from Bruce Metzger's Greek New Testament. It is considered a translator's bible because it is heavily annotated. For each verse, the source manuscripts and papyri are noted along with variant text from those sources.
What I remember is that while most of those sources were in Greek, there were some, though a rather small number, in Aramaic. What I do not remember is whether any of those Aramaic sources were to any verses in the Gospels. I have Metzger's book, "The Text of the New Testament", but I have better things to do than to read through that entire book in order to cast pearls before Faith (we all know her response to such efforts all too well).
As for the dates of the earliest manuscripts, we have
New Testament Manuscripts in Wikipedia giving c. 125 CE as the date of the earliest manuscript, which was to a verse in John. That date agrees with what I've always heard and read. That date would also place the earliest written NT source at about one full century
after the purported events.
Of course, if Faith disagrees and wants to claim that there are earlier manuscripts, then she should name some of those earlier manuscripts.