We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Getting ISBN for coil bound book sold on Lulu only
I'm looking at publishing a coil-bound book on Lulu. I realize this means it can't be distributed on Amazon etc. I understand I don't need a barcode for this, and see that if I use the one-piece cover designer, I can generate a cover with no barcode. But, if I use one of the other cover tools, I do get a barcode. Is that a number I could use in my own cover if I chose? Even though I don't necessarily need the barcode, I might want one anyhow just in case I want to sell the book through other channels myself, and don't mind if it's a Lulu-generated code.
So, can I go to the regular cover wizard, copy the number I see there, generate my own barcode using that number, and insert this into my one-piece PDF?