I don't have seeds for these. I bought a couple plants from a local plant sale. It must have come from there.
Absolutely no recollection of ever buying a Jamaican Mushroom Pepper, but I won't say no to the fruit!
Did you buy any Scotch Bonnets? Jamaican Mushrooms are sometimes mistakenly sold as Bonnets, since the pods look very similar and the two can be easily confused by those who don't know how to spot the differences.