Pop ... I gave the "oral syringe" a trial, just to see if it would indeed work as I thought it would. It did work well. The "oral syringe" tip works better than a regular IV (needle) type syringe, because the oral syringe only has the tip and not the surrounding threaded portion needed to hold the needle in place. The oral syringe I tested was a 10ml size, and the extrusion of nibbles is rather small, but will fill the hollow body of a 1.5-2" tube bait with no problems.
I thought that putting on the "cap", that comes with these syringes, would allow me to leave the nibbles within ... but, after a couple of months they were dried to the point where they couldn't even be dislodged from the syringe. The syringe sat that long because I wasn't actually using the nibbles ... just "testing" the idea.
It was not my intent to dissuade anyone from purchasing the Bait Pump ... but, merely as a "poor man's alternative".