Greg, Mr "SN Cracker",
I continue to "recoil in fear and awe" at the sight of the new supernova you discovered!
Here is a (continuum subtracted) H-alpha image of IC 4901 which was made by the southern Ha imaging survey called SINGG. The image is at a logarithmic scaling, and there is also a Broadband Red Light channel which is added to it, displaying here as blue.
H-alpha images of southern galaxies made in the SINGG survey can be found at:
http://sungg.icrar.org/home/portal