It may or may not be original, don't know. If it isn't and you want an 'original' one be prepared to pay out fairly big bucks, or spend a long time looking.
my 2¢ worth...
Bumper jacks only belong in the trunk, not under the bumper holding up the car. If you want to clean it up so it looks great and leave it strapped in the trunk for 'show', go for it. No one but a purist will suspect if it isn't factory original.
Find (salvage yard, craigslist, garage sale) a decent scissor jack from a mid/large-ish sized suv or crossover to keep in the trunk in case of a flat.