I decided to take my XL clearomiser apart to clean it, and since I have a few extra 3ml ( terumo brand) syringes laying around, I cut a new tube, wrapped the bottom connection point that the original tube slid down over in plumbers tape enough times to make it thick enough to fit inside the syringe tube, and walla! It works, has a bit more room than the original tube, and my 510 drip tip fits in the top. So if you have clearomizers that have cracked, all is not lost. Just have to make sure there is enough plumbers tape wrapped around it to create a good seal and keep the tube from moving.
**update, let it lay horizontally all night, no leaks**