No problem, here are 2 versions both have the gray background removed, but when I removed the black lines around the gores, there was about 2px of empty space between them; so I've uploaded a copy with and a copy without those black outlines. The outlines are generated by G.Projector even when there's no graticule; I'm not sure how to turn it off, sorry!
Click image for larger version. 

Name:	europa_30degree_sinusoidal_outline.jpg 
Views:	1541 
Size:	3.77 MB 
ID:	53064 Click image for larger version. 

Name:	europa_30degree_sinusoidal_no-outline.jpg 
Views:	1480 
Size:	3.57 MB 
ID:	53065

Hope these help!