Possibly in your local appliance parts store. -Or online.
Try egunparts
The best place to find parts for a Whirlpool dryer would be the Phillips website if the model is relatively new. If it is an older machine then Espares would be a good source as they are able to find parts for most electricals.
Did you find a wiring diagram that I can download or copy of the diagram
On www.FirearmsGuide.com
what year and model?
The wiring diagram and schematic are in the installation manual.
Send me your email & I'll send you a scan of the diagram. USDF
There are many places where one can find a whirlpool 4396841. One can find a Whirlpool 4396841 at popular on the web sources such as Lowe's and Appliance Zone.
Egunparts
You will find a Diagram for the tent at Sears
Whirlpool products can be found globally. To find your local authorized Whirlpool service center, check the literature that came with the appliance or you can find it online via the Whirlpool websites.