Commander
Howdy Josey,
Yep. Colt still makes Commanders...steel or alloy frame...but the dual caliber that you want probably won't work, at least not without a lotta work and cussin'. Aside from the difference in ejectors and slidestops,
the feed ramp geometry and dimensions aren't compatible between the two calibers.
The hard chrome would be a gunsmith project.
Hope this helps,
Tuner