Just been having a nosey at Cosworth website as I know they are making Forged components for most manufacturers of cars now & are not just ford!
So heres the links for Nissan & SR20DET etc. These links are more for info than prices, So you woul propably need to speak to them direct regarding prices etc.
Forged pistons
http://www.cosworth.com/products/performance-parts/forged-pistons/nissan/
Forged rods
http://www.cosworth.com/products/performance-parts/connecting-rods/
Piston rings
http://www.cosworth.com/products/performance-parts/forged-pistons/piston-rings-and-tools/ring-sets/
Piston pins & circlips
http://www.cosworth.com/products/performance-parts/forged-pistons/piston-pins-and-circlips/
Big end shells
http://www.cosworth.com/products/performance-parts/engine-bearings/
Headgasket
http://www.cosworth.com/products/performance-parts/gaskets/head-gaskets/
So heres the links for Nissan & SR20DET etc. These links are more for info than prices, So you woul propably need to speak to them direct regarding prices etc.
Forged pistons
http://www.cosworth.com/products/performance-parts/forged-pistons/nissan/
Forged rods
http://www.cosworth.com/products/performance-parts/connecting-rods/
Piston rings
http://www.cosworth.com/products/performance-parts/forged-pistons/piston-rings-and-tools/ring-sets/
Piston pins & circlips
http://www.cosworth.com/products/performance-parts/forged-pistons/piston-pins-and-circlips/
Big end shells
http://www.cosworth.com/products/performance-parts/engine-bearings/
Headgasket
http://www.cosworth.com/products/performance-parts/gaskets/head-gaskets/