Well, i'd steer clear of trying to get a forum member to mail you something. I doubt anyone here is comfortable with their address being known by a member they do not know/trust irl/afk. Theres always the possibility of leo requesting something like that, and using the return address (even if its fake with cctv at your po box/do surveillance at your house/know your address/name and be able to monitor you based off the possibly incriminating posts you may or may not have made.
But its used in wine making, as an acidifier. If you have a local store, or can find a close one via google maps services, that would prob be your best bet for finding fumaric acid locally/inperson.
"let those who have talked to the elves, find each other and band together" -TMK
In a society in which nearly everybody is dominated by somebody else's mind or by a disembodied mind, it becomes increasingly difficult to learn the truth about the activities of governments and corporations, about the quality or value of products, or about the health of one's own place and economy.
In such a society, also, our private economies will depend less upon the private ownership of real, usable property, and more upon property that is institutional and abstract, beyond individual control, such as money, insurance policies, certificates of deposit, stocks, etc. And as our private economies become more abstract, the mutual, free helps and pleasures of family and community life will be supplanted by a kind of displaced citizenship and by commerce with impersonal and self-interested suppliers...
The great enemy of freedom is the alignment of political power with wealth. This alignment destroys the commonwealth - that is, the natural wealth of localities and the local economies of household, neighborhood, and community - and so destroys democracy, of which the commonwealth is the foundation and practical means.” - Wendell Berry