I don't know what your looking for inspiration wise but here is a cocker and a nelson I built.
Freeflow lotus cocker body
sanchez machines mini pump kit
ccm thin .45 frame
shocktech rat valve
madman spring kit
gun shoots amazingly I love it, but now have a ccm so it doesn't get used.
and this won't help you any, but its a tm-11a converted to stock class. I wanted a grungy look for this gun.