poly 318 thermostat housing

I've been looking for an annoyingly specific part, its a thermostat housing for the wide block 318, but instead of going straight towards the radiator when mounted, it angles towards the drivers side



The housing in this picture (from Ebay) is installed backwards, but it is the part i need.

I have a regular, straight forward type housing i'm willing to ship from boise as an even trade, or i will pay eight bucks for the part.