I've been printing 120 panoramics for years using a stretched 4x5 enlarger. The enlarger will handle a 4 x 14 neg and has a colour head. Most of my negs are around 12 inches in length. I haven't used the enlarger for a few years as I'm now scanning the film, output is digital. I may get rid of the enlarger as it's taking up space.
At one stage I was building an 8x20 enlarger for bigger negs. I managed to get hold of 2 identical 8x10 colour heads but never got around to doing the conversion.