: Offers an "ARCH Series" imperial set that specifically includes a 8.5" x 11" Letter size title block.
: A community-driven source where users often share horizontal and vertical 8.5 x 11 templates for free.
If you can't find a download that matches your company branding, creating your own is a 10-minute task using Revit’s Family Editor. Parametric Title Block in Revit Tutorial
: A massive library of free Revit families where you can search for "Title Block" to find various standardized formats.
: Provides ANSI Architectural title blocks in RFA format, often featuring "borderless" styles suitable for modern printing. How to Create a Custom 8.5 x 11 Title Block in 5 Steps