Here you go PM. A lot cheaper than a reconstructed seat:
http://www.lovemybubbles.com/shoppaddedunderwear.shtml
And not nearly as restrictive as cycling shorts.
Seriously though, your local Wally World may have a mock flex gel pad, similar to that used by Spencer, in a very durable covering with carrying handle for $18. WW's flex gel pad isn't "med" blue.
The bottom is non slip and the top is mess fabric. Just right for a beaming individual such as yourself. I got one for the better half's bony butt. It's a bit broad for the pillion seat.
And now that I've found lovemybubbles.com I'll have to get a matching set of his and her's. I trust they carry wide-load widths. I see they have "nude" and extra padding. Now we're talking; I'm not partial to hot pink.