ok, the story is as follows.
The M115A1 is a M113 upgraded with spare LAV turrets and issued out to National Guard units. MY example is a leftover in the states that has had extra armor plate added with spacers to help make the platform more survivable. Also, since RPG's are not only prevalent but also able to puncture the M113 fairly easily, a anti-rpg screen was made from simple Iron stock. No bed frames used here!

All of this is based on my own real-world experience in a metal shop, so it is crude but easy and quick. It should also be effective.
The esci kit is a good start, and there are plenty around to buy still. They run around $20, which seems to be too much. Maybe someone will do a conversion with a better hull top.
the Mk19 is the DML offering. Fiddly, but beautiful.
and thanks for allthe comments guys, it keeps me going! The rest of you TW2K guys seem to be doing just as well.