Need help finding where a texture is in a GCF

I need to find where Portal’s lights/white003 and white005 textures are located. Contrary to logic they’re not located in the portal/materials/lights directory of the portal content gcf, and searching the whole gcf for these files returns zip. The only textures are white002, 007, 008, 009 and 010. Where are 003 and 005? Hammer sees them, and the textures work, so they must exist somewhere. Unfortunately hammer doesn’t divulge where.

Can anyone help me?

Found both in “source materials.gcf”.

You’re awesome. Thanks.