WTB. buick/Rover 300 worked heads

[Targa-force-76]

Hi everyone, Currently searching for some worked buick 300 heads but anything else considered, must be suitable for a 5.0ltr 4BBL. Freight will have to be factored in, as I an in OZ. Prepared to pay a fair amount. If you have options or know of someone, please shout out. Thanks and Keep safe John