As far as custom mods go, @Whiterose0818 makes a very artistic mod to your request. They are also extremely economical for what you get and the Excellent customer service you get.
The PWM mods require some advanced knowledge to use but not like a mech mod type of knowledge. You follow the guidlines and rules of battery safety and ohms law and you have one of the best flavor,and hard hitting mods made.
You know how you take a 5-6 second hit off your Griffin and get a nice dense flavorful cloud? A 2 second hit from a whiterose makes those Griffin clouds look like childs play.