You can get the cheap butler creek caps, or the slightly better vortex caps. The vortex caps are better, and fit nicer, hold better.
Or you can get the tenebraex caps. Little more, but they are again better than the others available.
https://armament.com/shop/scope-covers/#/filter:custom_optic_brand:Vortex/filter:custom_optic_model:Razor$2520HD$2520LHT$25204.5-22x50