I am having these fabricated. https://1drv.ms/a/s!AqaEiIhKCAKbkfxC6ArlPPtJEkXjcQ

This tray will hold a 200 A/H battery such as MR197-200 Deep Cycle, High performance AGM Battery (vmaxtanks.com)<https://www.vmaxtanks.com/MR197-200-Deep-Cycle-High-performance-AGM-Battery-_p_167.html>

Let me know if interested. If local (Long Island) I can also install the tray and electrical to use and charge that battery or other desired.

Dennis