Where to buy new saddle tanks??

[one legged lance]

After seeing the thread on removing saddle tanks I got tot thinking it would be nice to put them on my truck since the bed outer sides have the doors on both sides and I could free up the interior space.
Problem is I looked around the net and can't find new poly or metal tanks.
Clues anyone?? I really don't want to hunt the junkyards and then have to fix up a pair of tanks. Also looking for the lines and valve or ideas for workarounds.
Thanks in advance,
1 Leg Lance