I've been running various saddles on one of my cruisers. Tried a Brooks, then a nice thick padded vintage style springer saddle. Both were good, real good actually, but I wanted something a bit more custom. I borrowed a cool old pre-war seat from my brother and wondered if one of my boardie seats could be adapted to fit the vintage undercarriage and how it would look. Here is what I have so far. Not a direct bolt-on but the idea has potential.
Sportsman Cruiser Saddle by Sportsman Flyer, on Flickr
Sportsman Cruiser Saddle by Sportsman Flyer, on Flickr
Sportsman Cruiser Saddle by Sportsman Flyer, on Flickr
Sportsman Cruiser Saddle by Sportsman Flyer, on Flickr