Borrowed our company's DeVilbiss Pressure Washer, model EXHA2425.
Because of its age all but one of the nozzles are missing. Specially
the one I need, the low pressure nozzle as I need to use the chemical
pickup feature for the siding cleaning project this weekend.

Question is are these generally available? Might they be a common
attachment or a proprietary unit only available at select locations?
Lastly what should I expect to pay for either a single or set depending
on how they are sold?