So as a little update from the past months:
I managed to get in contact with Rina-chan, I sent her the lines, and now I'm just awaiting for her to actually record them and send her the payment I owe her.
Solrac on the other hand, has not been as successful in contacting, as I seem to not get him at the right time.
But still, with Kira's lines almost obtained, that would mean that the animation is nearing the halfway point as far as completion goes.
-The Brotaku Gamer