Well ordering online is always the thing here in Qatar... I did it with a lot of things.
But my patience is limited when it comes to new "toys"... when I want it, then I want on the spot :-).

There is two types of dosing pumps, peristaltic hose pumps and piston pumps.
In hospitals they have both, the peristaltic ones where the hose is fed through the system for blood "filtering" etc. . The piston one are like the ones that can take a syringe. Both are very expensive when it comes to medial systems.
I have not seen any second hand medical equipment for sale !

But never the less I could ask my medical supplier if he has a cheap chinese version or so...

A small peristaltic head usually costs around 75QR, plus a small controller... so I might order at one point a couple go in to business with them in Qatar !

Do you need one ?