waterneck (thermostat) housing for Edelbrock Rover 215 Intake manifold

[donfaber]

I'm looking for another Waterneck (Thermostat)  housing - I have a Rover 3.9L with Edelbrock Performer Rover 215 Intake manifold. Thernostat mounts on the front of the manifold.The housing I have doesn't allow enough room for Distributor to turn for full timing range. Does anyone know where they are available, or have one for sale? Thanks!