pump rotor fittings needed for school project donation?

for my sons final grade in votech since classes are now away we need 5 line connector coupler unions? unsure of this parts actual name. we don't need anything but the line parts to attach the line to the rail. trying to keep this as low cost as possible. we are using a welding tank gauge and a engine bracket from the scrap pile. these are the only part we need to buy of source somehow.


im helping him make an injection pump powered pop tester and pump tester that can be drill operated. I have a pump but no spare parts to hook the lines into the common rail he has started. we are basicly copying the one from youtube exercising fabrication skills and the actual knowledge on how to document and adjust pop pressure and spray pattern since we have some old injectors.
https://www.bing.com/videos/search?.../search?q=tdi+injector+pop+tester&FORM=HDRSC3