Many thanks to all of you for replies. I didn´t expect this issue to be so difficult to solve. US private adapter sellers refuse to ship abroad and here in Europe there are for sale as many as chickens teeth. That Canton adapter looks nice but it is 2" tall (=50mm) and the space I have is 1,4" (=35 mm). The red arrow in the picture. Space between oil filter base the point where the filter seal meets the base and nearest header tube is that 1,4" /35 mm.
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