Well, it's possible, but may be very difficult on a typical band saw.But, I wasn't even sure cutting them down was even possible. Didn't want to go ask the guy and have him look at me like I had 3 heads...
The saw can likely cut that, but it's handling the large timber for it to do so.
May need to cut 12' down to 8' and 4' before re-sawing.
Tell them "I know this is probably a long shot, but can you cut this?"
They may have other resources, tools, or techniques that you are unaware of.