Porcogen is produced by the Taiwan company Sunmax.
The company's core technology is based on ultra pure collagen derived from porcine dermis.

Porcogen is an excellent alternative for bovine collagen and has the same purity.

You can order Porcogen on-line or you can ask for a free sample.

Description
Porcogen is a sterile solution of purified collagen extracted from Specific Pathogen Free (SPF) porcine skin. It contains stable collagen protein with a native triple-helical structure of molecular weight around 300 KD.

You can order Porcogen (or a free sample) here