Certainly. The sights are available from brnomann - just PM him here at RFC. Or, you can look on GunsAmerica - just type in BRNO and "nongun" and his ads will come up under DEJAY. Denny is a really neat guy and you will enjoy his enthusiasm for all things BRNO. The sights he has available were originally made for the BRNO target models and have a 16mm bottom groove - be sure you ask him for the 16 to 11mm adapter when you order. The rear sight -either "Match" or "Olympic" will, with the adapter, fit onto the 452's 11mm groove.
Still lacking, and soon to be available thru brnomann, is the compatible front globe sight setup. According to Denny, the front sights he has coming will adapt to the CZ 452 front dovetail, and will complete the set.
Nothing against Brookie's aperture sight - I have a couple of those and love them - but this looks like the real thing - and with real Czech parts, too!