bramblebee,
Welcome to the forum community. I was about to recommend re-potting the plants into 1 gallon pots, but I see that you have done that. I am currently growing several dozen fig plants in south facing windows without any adverse affects.
I purchased figs from EL last year in 2 inch pots, they were well rooted cuttings that grew over 3 feet in my short season. Their 3/4 gallon and larger figs are well branched 2 to 3 feet tall, and will bear fruit in the coming season ( I purchased VDB and Brown Turkey in 3/4 gallon). I purchased a few 4 inch pots recently (on sale) and they are well rooted plants, but they are all still dormant. Their Hardy Chicago is reputed to be a very good variety.
Keep a lookout for fungus gnats from the EL potting soil.
Good luck and Happy gardening.