I need a sole source document. Where can I find it? January 07, 2026 15:28 Updated You can download a PDF of our sole source letter. Attached please find the PVB Sole Source Letter 2026. PVB Sole Source Letter_2026.pdf 60 KB Download Related articles Does PVB have accessible versions of the books? I need a copy of your W-9. Where can I find it? Where do I send my order? Shipping and Handling Information Free 1-Year Digital Reader Subscription with Purchase of Eligible Kit