I am working on a book of documentary aerial photography of West Texas and Eastern New Mexico of the Llano Estacado country. I need to create a map that shows our aircraft flight routes. I have GPS coordinates and am quite good with Adobe Photoshop tools for vector drawing. I am trying to find a good base map (or satellite imagery) of this large area the size of Indiana. I am currently learning USGS National Map and EROS and am a registered user of the latter so I can use the download client.

In Wikipedia, I found this great wide terrain view of the area, but I cant locate the source - the given one is a broken link. Take a look at the attached pic and let me know where I could find this base imagery/map. I cant seem to post a pic, therefore I will include this Wikipedia link to the type of base map that i need:
See this: https://en.wikipedia.org/wiki/Llano_Estacado#/media/File:LlanoEstacadoShadedRelief.jpg

Wishing you great light and happy landings!
Paul