You need a chassis to fix that I'm afraid.
Changing it also involves a full strip down.
As you are in the US, a new one can be had from Sears but they are an eye-watering $154. See here: http://tinyurl.com/c59rs7o
The part number for the US is 908656-03. There will be other suppliers if you Google.
The UK part numbers are: 908656-01, 908656-02 and 908656-05
I don't see why a UK one wouldn't fit, they are not expensive here new (About $56) but shipping wouldn't be cheap as its a big box and couriers charge by volumetric weight rather than actual weight. Sniffing out a used one on eBay in the US would be my first choice.
If you are reading this in the US and you have one of these, do holler.