Thanks for the suggestion. I was hoping to find something a bit more refined. Definitely post pictures of how the copper end caps turn out.
I would advise against the jaben aluminum cups, i have tried them before and they are crazy heavy. Its like a GS1000 milled in aluminum with added weight. http://www.bb3.com.au/ These aren't in production yet so you could ask them if they would make one for you. No idea if they would respond. Lastly you could do what i did to get a set of aluminum cups; i searched the forums for people who did wood cup mods for their SR325is and PM'ed them (actually the first person i found) if he would let them go for a price.... and now i do have a set of alu cups =)
Thanks for the link. The bb3 cups is exactly what I am looking for. I e-mailed bb3 hoping they will get back to me. Since the cups are not available yet, I am doubtful I will get any response.
I also read the Jaben aluminum cups are heavier compared to the PS1000. The PS1000's are already very heavy from my experience. You are probably right in that they are too heavy.