By Bill Wilson The Wichita Eagle A 13-year-old Wichita computer company is growing, moving into a new 30,000-square-foot South City location as its custom PC business expands. CybertronPC, a Wichita company since 1997, has moved to 4747 S. Emporia, just off 47th Street South near Braum’s, with an eye toward a larger market share, said…