It's been a long time since your post, hope you get this. I, too, am a descedent of Johann V. Schuller. Did you know that there is some of JVS's artwork in a collection at the Penn State University Library? For a very small fee they will scan it with a high quality scanner and print it out in actual size and mail it to you. The document was written and penned by him in 1816. Contact me if you're interested. I can give you email addresses and file names.