I've played around with an insulin syringe as suggested and found the results to be unacceptable [to me].
The Touch-n-Flow is a very fine diameter pipette. The contents are retained in the pipette until it is touched to a surface to be glued. Capillary action draws the glue out of the pipette. Air pressure is minimal on the fine bore of the pipette so the glue doesn't gush out.
With a syringe, if you use the plunger to dispense the glue you need a firm and steady hand to dispense the glue out of the needle. If you don't use the plunger, air pressure enters the larger bore and causes the glue to flow more quickly than expected.
Not to say that a fine insulin-type syringe couldn't be used and the technique to dispense finite amounts developed, but why? A fine tipped paint brush, 5/0 or smaller, will do the trick as easily. Dip it in the glue to load and touch it to the seam to be glued. The glue flows out of the brush and into the joint by capilary action.
It may also be easier to find such a brush locally, in artist supply shops, than a Touch-n-Flow