Is there a term in Journalism that means "words written as they will be printed"?

The term is copy.

copy noun 3 mass noun Matter to be printed. ‘copy for the next issue must be submitted by the beginning of the month’ -Lexico

However, if the others are not familiar with this usage, you might be better off asking for the text that they want printed. The following example comes from cakemessage.com, a custom cake message maker:

Enter cake text below

YOUR TEXT APPEARS ON THE CAKE

From comments:

• "Please email me your text word-for-word." — Kate Bunting

Word for word means ‘In exactly the same or, when translated, exactly equivalent words.’ [Lexico]

• You might be looking for the word verbatim; usually, the publication states that announcement will appear verbatim in the issue of the indicated date. — Jeff Zeitlin

Verbatim means ‘In exactly the same words as were used originally.’ [Lexico]