Brewing Classic Styles has an all grain and an extract version - easy enough to work out partial from that.
We brewed a large batch as part of a case swap but swapped one noble hop for another.
Came out OK.
95.8% munich (grain or briess extract or combo)
4.2% carafa special
19.5 IBU @ 60 (BCS uses hallertau, we used tettnanger, could presumably sub any noble)
2.7 IBU @ 20
Any lager yeast.
BCS mashes at 68. We stepped and decocted ours but I wouldn't worry about that with a partial.