This is what I did.. It takes practice, is time consuming but you can end up with a nice result if you do spend the time..
Start by using cardboard to make a template of how big an what shape you want your pod/door card to be, then use a jigsaw to cut it out. I used 9mm mdf. You also need to source some speaker pods $50 and some vinyl enough to cover your whole pod for both doors.
Then strip the pods of their factory vinyl and remove the glue.
Use some PVA and screw the Pod to the MDF. Also test fit it to the car to make sure you are not installing it too low or too far forwards. Height is an issue as if it is too low you will be kicking the speaker and forwards is an issue because of the dashboard placement!
Once you are completely happy with position, start bogging!!! Use car body filler to smooth out where the pod joins the board.
Once you have bogged one and you're waiting for it to dry, start on the second one!!
When the bog has completely dried on the first one Sand Sand Sand!!! (my most hated part) make sure you wear a mask!!!!
Sand back with rough stuff and finish with some really fine wet and dry. Clean up all the edges and if you have window winders like me you may need to shamfer the wood right down aswell as the back of the window winder to stop it fouling you finished vinyl! Can't stress enough that final prep makes your vinyl look good or bad so take you time and make sure everything is silky smooth!
Once you are happy you need to get your contact adhesive and heat gun ready (on a warm not hot setting) and starting from the face ofthe speaker pod apply the adhesive working away from the pod. The key here is waiting for the adhesive to go tacky, before applying the vinyl!!!!
Cut a SMALL cross in the middle of the speaker opening to help it stretch and using the heat gun heat the vinyl into the dips and creases. This is the bit that takes alot of practice and I'm sorry I don't have more pics of it! You will end up with some wrinkly ball bag looking vinyl you need to hide behind the pod against the door jam. Very had to avoid this excess of vinyl
Anyways end product should look something like this, hopefully without bubbles.
I took these photos and never got around to doing much with them I will head out now and get a better shot of the finished pod with my nice new focals installed but this is a start!
Have fun!!