Firewall advice needed for Fujimi Fairlady

[Layla's Keeper]

Hello all.

I'm in the process of building a drift style Fairlady Z out of the Fujimi Wangan Midnight Akuma no Z. I've already added the Webers and BRE header out of the Revell BRE 240Z (I know, 1/25th scale parts onto a 1/24th scale model) and accurized the front suspension with scratch-built trailing arms and a kit-bashed sway bar (again out of the BRE Datsun 240Z). But know I've run into a sticking point.

The Fujimi kit doesn't really have any detail on the firewall, and the BRE Datsun's firewall is both misshapen and crudely detail as well.

I can scratchbuild the basic firewall with Evergreen sheet styrene, but where are good sources for bits like the windshield wiper motor, brake booster, and other misc. items? I don't want people to look into a barren bay on this piece. It would totally destroy the effect.