hey i couldnt get a touch n flow applicator here so i made my own....
just get urself as hypodermic needle point, the cut the tip off so its flat (the hole may block up, use a dremel with a cutting disc , if u doint have a dremel, cut it with pliers than sand/file it down till its open.), then just sand the tip so the edge is bevelled (no sharp edges!), then attach the needle tip to a pen casing or something similar and ur ready to go!!!
just a word of advice, i did the above technique, and tried it with water, but it wouldnt work, so if ur testing it to c if itll work, use t6enax or tamiya extra thin, not water...
my mum is a nurse so she brought me a whole heap of tips of diff sizes, so i have two, one thick and one thin
hope this helps....