I'm not sure how easy/difficult it might be to track down an authentic kfl these days, but its possible. You could get the nano kit for it, and even a shorter drip tip. There are so many tiny drip tips these days. I don't know if a bell cap would make it even shorter or not?
Drip tip length is not an issue I have found when tossing it in a pocket. It's the length of the wide portion that counts.