I'm sorry to say, (and correct me if I'm wrong), but if the artist has not released a crease pattern or diagrams of their model, then we can't (respectfully) upload crease patterns or diagrams of those models without the artist's permission.
Luckily for you, Chris Palmer sells cd's of his works, containing video diagrams of his works.
(I realise you're not asking for either of those, but they would eventually be uploaded here anyways.)
Best I can do is something along the lines of text - based hints. Think octagons. Think stars. I don't know.
Also:
http://www.youtube.com/watch?v=0FVH157LdME
This is a video diagram of Chris Palmers 12 point flower tower, which may help you in the process.