Pardon my interruption lol.
I think readily available tunnel ram option is only the wieand and from my experience with the wieand design is incorrect from the start. They have a reverse taper in them, small at the top bigger at the bottom. That's the reason I had put so much work into mine & the end result looked more like an M1 / Indy tunnel ram compared to a D shaped runner entrance that changed into a rectangle.
I think Sean's mod man will blow everything away that can be purchased of the shelf.