No, not something on a timer-- I just used the defrose button as an example.
I imagine building it myself would be more economical, as I have little to no money to spend @ the moment... or in the forseeable future. I already have several of this type of switch / button-- even ones specifically from from Grand Marquis' and Crown Vic's (traction control [full-size button], rear window defrost; as well as some two-wire lead buttons = trunk open, trac ctrl, fuel door, etc).
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Lovely Wendie99