And Wholesale Marine has it for $364 + free shipping.
http://www.wholesalemarine.com/moell...fuel-tank.html
phat, get to the tank and get the dimensions and compare it to the various ones Moeller makes. This is their site with dimensions, click on diagram for even more info.
http://www.moellermarine.com/oem/fuel_tanks/fuel-tanks/
See which ones will fit back in place easily.
Then find the Moeller numbers (in this case that 55 gallon is 032555) and compare the tanks cost as to your needs.
For instance (from the above mentioned site) the 55 gallon Moeller 032555 is $363.35 but a 60 gallon Moeller 032560 is $519.19.
Here is a hold down kit by Moeller
http://www.wholesalemarine.com/moell...uel-tanks.html
but depending on the situation I may be inclined to be a little more inventive, such as bradford did.