[Public-List] Replacement holding tank?

[George Mathis]

I've read about the Raritan group purchase on the maintenance page, but that seems to have been several years ago.
Does anyone have any advice for how to go about finding a decent fitting holding tank for a liner boat?
I yanked out the old Mansfield toilet/macerator/tank and I am putting in a manual Lavac.
BTW: Here's a pic of #439 under sail after in Georgia after 16 years of being on the hard in Virginia! http://alberg-boats.com/A30/439/09242011HomePort.jpg
Thanks for any tips.
-- George, #439 in St. Simons Island, GA/