There’s no legal “free download” of Helvetica Neue LT Arabic Roman with “extra quality.” Any site promising that is either distributing stolen files or malware. For professional Arabic typography, buy the license or use a high-quality open-source alternative like Cairo or IBM Plex Sans Arabic—your work (and your computer) will thank you.
If the cost of a full Helvetica Neue LT license is prohibitive, there are legal alternatives that offer a similar aesthetic quality: There’s no legal “free download” of Helvetica Neue