2) As you reside in the United States (and presumably you are a US citizen) then you could apply to the Spanish heraldic authority for a grant of arms. The Spanish heraldic authority grants arms to individuals in the former Spanish possessions. As all of the New World was, at one time, a Spanish possession, you would qualify for a Spanish grant of arms.
Not only that, but Missouri was once a Spanish posession, i.e. Spanish Louisiana.

But, with the death of Don Vicente De Cadenas, Cronista Rey de Armas, what is the status of the Spanish Heraldic Authority?

Regards,

Todd*

*Down in Springfield