I'm searching for a commercially available pre-stained native PAGE marker compatible with both native PAGE and Western blotting. The NativeMark™ Unstained Protein Standard works well for native PAGE but is unsuitable for Western blot transfer. Is there a way to add a chromogenic compound to the NativeMark™ Unstained Protein Standard to visualize it on PVDF membranes for colorimetric scanning during Western blot detection? Any suggestions would be greatly appreciated.