If you are specifically searching for digital formats like , official options are more limited:
For decades, only a handful of Tex stories made it to the US and UK. Tex Willer Comics In English Pdf
These sites are the gold standard for public domain comics. Because the early Tex Willer stories (late 1940s/early 1950s) are often considered public domain in certain jurisdictions, you can sometimes find the earliest issues scanned here. If you are specifically searching for digital formats