Hey Darryl. I have the Metco fuel cell, but I have not installed it yet. Do a search on this site. There are a few that have theirs in use. Check this guy out. He had a cell for sale a week ago.
Overall, I like it. You're limited to about 5 useable gallons if you go with a double pumper setup. I got the next to last one from METCO a few years ago. I thought I remember reading that someone was going to have another run of them produced.
Metco recently completed a small run of these fuel cells and both in-tank and external pump models are available.
They're not on Metco's website but you can buy 'em direct - 864/3325929.