I looked, and indeed do still have most of those Monogram 1:48 decals for Ira Bong's P-38, including the "Marge" name decal:
Note they are ancient - yellowing somewhat, and some appearing damaged - however IIRC the actual Marge picture, when used only a couple years ago, performed quite well (on my Rangoon Hurricane, re-christened "Snooks"). AND, note, I cut her out so precisely that the square area she once occupied is clearly indicated.
All you need is a woman's face large enough to fill the space, and accordingly I searched for my best-still-available candidate for that, coming up with the reclining lass also shown. Now, she is stretched out rather longer than the space allotted - and exhibiting an, er, distinctly different attitude, one could say - but still you could crop just the optimal part(s), to fill the area:
Click on Image to Enlarge
Because that, above, is as much of "Marge" as I could uncover - er, I meanůdiscover, stashed away in my closet, here.