I had Ron and John's Comanche service make a panel for dual 7" HDX screens for my Comanche. The spacing is pretty tight between the top of the yoke and the glareshield for a 10" display. As I recall, the 10" would barely fit, but I decided on two 7" screens. I have the left screen centered on the control column, with PFD and EMS. The second screen is to the right next to the radio stack, used as MFD/map. I sent John a sketch of what I wanted, he drew it up, then had it cut. Cost about $900.
The existing panel is structural, so a STC is required for the replacement panel.
My '63 already had the center radio stack, so it was a little simpler than for a '59, but they can do a '59 as well.
johnvanbladeren AT gmail. He is a great guy.
I will try to get photos and drawings posted for you.