Rare Lens Hood Leica Summitar (SOOPD replacement)

Rare Lens Hood for the Leica Summitar 5cm

Whereas the SOOPD lens hood is more commonly used, this aftermarket , period-correct round lens hood with the correct weird protruding 36mm thread that sits in the recessed front barrel of the Summitar lens, shown in the pictures here, is a hard to find alternative and rare item.