MilwRdPaul - I have the 75 year collection of Model Railroader and unfortunately it is not one of the stations.
Perhaps you might check with https://www.mrha.com/contact.aspx Milwaukee Road Historical Association. They did an article back in 1983 on the station and had their convention there I think in 2010.
Also this issue has an article about Wausau https://www.mrha.com/store/product.aspx?Product=109&Name=1st+Quarter+TMR+-+2010
Good Luck