Rolex 6mm crown (large tube), where to find??

[Tulex Seik Jr.]

Hi all,
I am looking for a 6mm crown and tube for my 34mm oyster case from the 50s. I need the one with the larger tube where the part that screws into the case is 2.8mm. I see it listed on the Yuki sight, but then the link says that product does not exist. Can you suggest a source for this crown and tube?

 

[pompompurin]

For 6mm crowns of this era, I think you need a 6020 tube which fits 600 crown