buying new doors would be the EASIEST option you have. you can unshave them, but it'll take a good bit of time and some work to get all the mechanical stuff back in. make sure you have the handle in the right spot. the door poppers shouldn't be to much as a hassle to remove, depending on the location.
if you got the time and tools to to install the manual doors, do it. if not, might want to look for some new doors.
i had a client want me to do it to his civic, wasn't fun, but yea you can do it.

*EDIT*
if you know how to spot weld, you can buy new skins for the outside of the door. and just replace skin. holes should be cut and ready to slap on.