Paula,
If you want a round dishpan-thingy for your lobster bowl sink, a good place to look is the outdoor/picnic supplies aisle at WalMart. There are always lots of differrent colors this time of year.
They also usually have some in their kitchen/household goods aisle.
Of course, there are no round ones with the regular dishpans, these are meant to be serving bowls, etc. Inexpensive and perfect size.
Sounds like you a getting settled in and doing some nesting. That's a good thing.
Maggie