pressure washer handles

[Major Collins]

I been looking around at getting a pressure washer handle though i wanted to make and fit my own handle on it.
Does anyone have pictures or a video of the internals of a pressure washer handle?
ive tried looking around for some but no luck

these are the ones ive been looking at
http://ace.imageg.net/graphics/product_ ... enh-z7.jpg

[fenrir]

The inside is just a poppet valve actuated by the trigger.