I don't believe there have ever been a pair of chrome moly bullhorns made. Bullhorns are intended for weight-conscious aero efforts, not for applications where steel bars are more popular (sprint/kilo/keirin). I'd also suggest cutting off some steel drops. You don't need chrome moly bars for this. They actually are a bit more brittle and stiffer (their only advantage is a slight decrease in weight, which is achieved by going to a much less compliant steel tubing), so you'd find better comfort with a pair of standard steel Nitto bars. The chrome finish is identical on both types of steel.

Do be aware that if you're using the steel CT-80 stem, you really don't want to use alloy bars. The stem clamps so strongly that it will compress alloy bars and can create a substantial dent that can lead to collapse. It's a superbly strong stem if strength is what you need, and does a better job of clamping steel bars than pretty much anything out there (including the Nitto Jaguars).