oh before I forget JG g36c silencer is 14 mm CCW. You don't have to specifically find a "g36c" silencer, but rather a 14mm CCW threading silencer.
eg
http://www.airsoftparts.ca/store2/in...oducts_id=1046
I think the hardest part is finding one that is just the right size.
http://www.airsoftparts.ca/store2/in...ex&cPath=67_99
Flashlight I don't know but as long as you have a side rail you can buy a light mount from ehobbyasia or dealextreme for cheap.
eg
http://www.dealextreme.com/products.dx/category.914
LAZORZ on that link too so you can cause retina damage before you shoot them. Also they sell cheapie flashlights too.