Fender Liner Extension Left Front

[Z4RSA]

I was quoted $320 (USA) by BMW in South Africa for the left front "Fender Liner Extension" for a 2006 E85 2.0. My mechanic recently noticed it was cracked. Any advice on whether it can be sourced cheaper? No way I'm paying that!

Part Number: 51717168995
Attached diagram: part 6

I'm located in Cape Town, South Africa