I just met a young man who is a new ba'al teshuvah. He had a horrible upbringing and spent time in prison. He turned his life around 180 degrees and is now Shomer Shabbos, etc. he puts on tefillin that were given to him by a non religious relative. They are the pshutos type that non-religious Judaisc stores used to sell. I doubt they were ever kosher.
1. Can he assume kashrus and continue using them with a bracha or
2. Is there a tefillin gemach that could lend him a pair. He has little money and is saving to go study in Yeshivah in Israel.