The Canon 50mm/f1.2 in LTM meets the criteria of affordable and nice bokeh (though some would argue with me here), and it is compact front to back, but it fails on all other counts. The 55/1.2 FD conversion meets all the criteria but compactness - it is about twice as long as the older LTM formula, tthough it is smaller than a 35mm/1.2 Nokton, 50mm Noctilux or 75mm Summilux.
The lens you are asking for is the Konica 50/1.2 Hexanon that comes with the Hexar RF Limited kit, but that lens fails miserably on the "affordable" front, as does the somewhat bigger Hexanon 60/1.2 in LTM.