An old electric pressure washer part


Briggs and Stratton 020358-00
this old pressure washer has sentimental value i’d like to keep her going.
it appears to have something to do with the soap…
the problem is it cracked…I have rigged it to a point I can still use on light duty stuff…but would like to find a junked one, or this part if not too outrageous.
i know I can buy another 1800 psi for practically nothing…but like I said this ones been around 20 years or so and would like to get her back to full working condition.
thanks for your help

This is a board for professional washers, might want to try another group dealing with homeowner machines.