Need advice on making changes to long fillable document

Acrobat Pro 9.4.5: I have a 30-page fillable/saveable document with spaces for users to fill in lots of information on every page. When I created it I had not thought about the problem of updating it with new names associated with the signature blocks, nor the problem of adding/changing text.
I was hoping to find a find/replace feature for changing names, but I realize it isn't Microsoft Word. But while the TouchUp Text Tool highlights the text, it will not allow me to type in replacement text. I created the document in Word, so I do have the right font (that was listed in the Help as one reason TouchUp might not work).
 
So the Help suggests I go back to the original Word document, make all the name changes and insert the changed paragraphs, then convert it back to a fillable/saveable pdf. But I don't relish having to re-create all those fillable spaces over 30 pages of document. That took hours to make up all the boxes. I'm a novice at Acrobat, having used it only once to create this fillable document. I would welcome any advice or suggestions anyone might care to offer. Would Acrobat 10 help any? Thanks.