I'm installing IKEA Pax cabinets around two walls of a large room. I've removed the baseboards so that the cabinet backs can be completely flush against the wall as required. There are two outlets on these walls with cover plates that stick out 1/4" and thus cause a problem here. I am planning to remove the outlets and cap each wire in the outlet box with a wire nut. But I understand I should still place a cover plate over the receptacle since there are live wires inside. The problem is, almost every cover plate I've found (e.g. this one) are beveled just like the outlet cover, such that they protrude 1/4" from the wall. Even this one, which is flat (no bevel), is 1/4" thick.
A lot of ceiling fan junction boxes come with super thin (and flat) sheet metal covers. I'd prefer something thin and flat like this to install over my unused wall outlet boxes. Does anybody know of an off the shelf product I could use? If not, would it be a bad idea to get e.g. the thin metal cover plate from a ceiling junction box like I mentioned, and trim it to the size of the outlet box (plus some overlap for the drywall) and use that square as a cover? Again keeping in mind the wires inside will be individually capped in wire nuts.