Jesse,
The standard chambering for the Redhawk has always been 44 Magnum. However, occasionally Ruger has made a run in a few different chamberings, namely 357 Magnum, 41 Magnum, and as you mentioned, 45 Colt. They don’t however make runs of anything but 44 Magnum on a regular basis. They did make some in both 7.5” and 5.5” chambered in 45 Colt in the 90’s, and again in the last decade. The more recent run also included the 4” model. Just keep watching as I’ll bet they will make them again. Also, Gunbroker has listings currently for Redhawks in all chamberings and in all barrel lengths.
