Replacing Driver's side Seat Foam

[TiAgBMWXI]

Anyone have experience replacing the drivers side bottom seat cushion foam?

I have an '06 with standard leather, heated, power seats. I thought the seats in this car were just terribly uncomfortable, as my back is always sore on long drives. I rode in the passenger seat recently while my wife drove and it was way more comfortable, I realized the drivers seat is probably just worn out and shaped to the PO.

I found this cushion online (Part #: 52108099306):
https://www.ecstuning.com/b-genuine-...y/52108099306/

Looking at Real OEM, it looks like the cushion is the same for heated or non-heated. Any guides or DIY posts out there? The foam is kinda pricey, so I want to make sure i know what I'm getting into prior to buying it.

I had originally wanted to find sport seats to put in the car. But I think having brand new seat foam may be a more financially reasonable way to make the car a bit more comfortable.