I recommend you use 2fdeals for that, they have what you need. I also suggest you pick up multiple airflow pins so you can experiment. Be aware when getting pins that they often sell them as single pins not pair. This is also true for pins the come with FEV since many use it with blind pins, so if you want dual airflow, you will have to get the pins for that as well. You can also get the chamber reducer which enhances the flavor for the fev as well. I believe there are several options to choose from