What options do I have? DIY?

If you absolutely want it on your left side, that flat area below the window sitch would except a ram ball, take the door apart and check out the switches, I am guessing that there would be enough room to finagle a ram ball mounted in there. If it's not your truck and you can't drill holes in it, you probably need to go to a windshield mount. I have ram balls mounted in like 4 different spots between my dash, and the headliner. Ram Mount is the only phone mount I have found to hold up the abuse a truck puts them through. I have my tablet and my phone both on ram mounts within easy reach when I am driving.

 

Looking closer at the pic again, that flat area above the vent on your dash would probably take a ram ball also and you could position the phone to be off to the left. It would be in the way of either that vent or the defrost vent and partially block one of them.

 

Panavise, on Ebay. Lots of various mounts that work with their phone holder.

 

I like my stuff close the power supply so I didn't have wires strung across the steering wheel.

 

that’s one reason why I have the gps with the built in dash cam, I hate clutter, phone usually just stays in the cup holder

 

Go to the ram mount website. You can look at all the different mounts and see what works best for you. You can order directly from them. They are expensive but they hold up well.

 

This is the one I use in my freightliner. I use the sticker pad and the "windshield mount" attached to it. You may be able to fit this set up above your mirror controls on you door panel. Onn+ 7-in-1 Universal Car Phone Mount Kit, Cup Holder Vent Dash Windshield with Adjustable Ball Joint - Walmart.com