Does not exist because it does not meet any code requirements (U.L., NEMA or Local code).
Any MFg. that would manufacture would open themselves to being sued (think Mickey D's had a loss over aa cup of coffee that was to warm....)
Change the wall plate.
After Hurricane Wilma, I made a Male x male adapter to run from my Generator to 1 circut in the hose to run the Refrig., A few lites, TV and fan. I pulled the main fuse from the outside disconnect to keep from backfeeding the power grid and to keep the house from being energized when the Power Company finally got power restored. I Tye wrapped the HOT male plug to the female recepticale to keep it from being pulled out and a HOT plug from landing on anyone or anything (not only shock issue but a fire issue).
After 21 days when power was finally restored, The first thing I did was pull the plug and CUT OFF the bastard end. Emergency use is one thing. Stupidity is another. Do it right for safety sake.