RETROLOCK (RLC) – WBE Certified Design Build Interior Finish Contractor: Doors, Frames & Hardware, Millwork, and Finish Carpe ... ntry. RLC HQ is based in Orange, California (as of May 1, 2019). RLC has additional office locations in Orange, CA, Henderson, NV and Livermore, CA. Visit us at www.retrolock.com and discover how the RLC Team is "Changing the Standard". read more