Marauzen CA870 folding stock - cosmetics

[Pringah]

hey guys,
got a stock ca870, i want to get the spring upgraded, and wouldnt mind upgrading the external cosmetic bits to full metal and more "swat" style with a torch etc. any ideas where the best place is to get them and how much am i looking at.

something like this
http://www.gp-web.com/en/productspop.php?pid=1389

but with a long barell

is it better to get bits or a complete new one?

again, where to get lol