Hi Jack, that sounds like not too bad a challenge that you’ll be up for. What you say about taking a clean brood box with fresh frames of foundation is what I would do. I would only use the best looking brood frames. Put them in the middle & flank them with the fresh foundation frames.
I would cut any drone brood out of the remaining brood frames before placing them above the QX so that the worker brood emerges. Then the bees will replace them with honey.
Remember, it’s early spring. Plenty of time for the colony to fully recover & return to a good working hive.
PS, you have good quiet beautiful bees to work with. A “beekeepers dream” rather than a “hive from hell”.
What I’ve done in the past if I don’t have a bucket to put unexpected comb honey into is use an upturned migratory lid as a dish. It’s no trouble to leave the roof off a hive for a few days, especially if you’re using a hive mat.