No expert here, just suggestions. Being as far North as you are I wouldn't assume that just because you don't see eggs or brood you have a virgin queen. Depending on her race she may not start laying until there is pollen and nector available. If you want to save the hive I would feed 1:1 syrup and some pollen substitute to try to stimulate egg laying in case she is not a virgin. Or you can dispose of her and combine the workers with another hive. I don't think taking bees from another hive and trying build up your weak hive would help alot and it could make your other hive too weak in the process.
Hope this helps and good luck.
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