Gamble, here's the rub...
You asked about "power" [which means electric] doors. AFAIK, unless perhaps POTUS has a special one for himself, there are no "true" power X-doors. Power X-doors would not be EMP proof.
Real X-Doors are sturdy enough, but they rattle, leak water like a sieve, and are not electric. They have no locks and provide no security. They are meant to stand up to warzones, be dropped from helicopters, and open and close. No frills. A good set will run 5K, and they are getting harder to find according to some posts on this forum.
There are Aluminum doors on the market with RV sliding windows I hate them. I think eventually the windows will leak, and the doors will show corrosion and will shows dents. There are 2 flavors I am aware of, one type is full length and one type can be split to allow half door use. Aluminum is a b!tch to bodywork, so dents won't easily be repaired and eventually you will want to paint the doors. They look fake and those RV windows just turn me off, (although others might feel differently). They are at least 3K.
H1 steel doors can be adapted to fit, but they are 12 Volt, won't look like X-doors, will rust and dent, and cost over 5K.
I got my doors aftermarket doors because they will be good enough for my purposes, but I have no illusions about which would be better in the zombie apocalypse. The doors are fiberglass, and that is easy enough to fix and repaint. My doors came with 24-12 Volt inverters, and look close enough to X-doors that they are passable. They were 4.5K.
There are, I'm sure, other sellers and such. Quality will vary. I chose my doors as they are manufactured by a guy who specializes in military vehicle sales. These doors will NOT be as robust as original X-doors and neither are they supposed to be. They look good enough to fool the casual passer by.
I will keep and restore my real X-doors for when I rent the vehicle out for picture sets and movies.
I will use the aftermarket-fake-imitation- non-military, ersatz, clone doors when I drive around town and need to open windows on hot days and lock doors to prevent theft.
You need to be realistic about what you want, what you need, what you can get, and what these vehicles really are.
If you want a civilian H1, sell what you got and get a civilian H1. Replica doors will not be military grade.
I don't mean to come off as cynical my friend. "Sturdy"and "aftermarket" for a FMV really don't belong in the same sentence.
Best,
T