The pumps which you inquired about are not in use by the most common posters here at the Think Tank. A couple threads in the past have inquired about a commercail grade apparatus for sauce large quantities of pies on a production line . . . but I do not recall what came of those threads. You may find them in a search of the old stuff.
Sometimes places like the one being poked fun of in the picture will engineer their own solutions. You could probably do it with a proper pump submerged into a vat of sauce with food grade tubing. In our county, the health inspector would expect a plan and specs of construction, use AND cleaning/sanitizing protocol. You could go that route, but I have no meaningful suggestion where to find a pump for such a venture . . . maybe a food manufacturing supply warehouse? A place that sells pumps for extruding doughnut dough?
Tom Lehmann or George Mills may be the holder of the obscure/uncommon knowledge you need.
