This is NOT search. This is for asking (creating) questions. The search is there: ↑↑

Why do you care? All level 3 Items have superior version in higher level; even the Improved sightings, which get mixed with combat scanners.

The real worry is that level 7 items will stop appearing. Shredder, Tungsten and Rail extensions stop at level 7. Although Rail extensions continue in the form of Scram Rails, Rail Extensions give more damage but generate more heat