Winged eyecup

Does somebody knows if this eyecup fits on older TV Plossl's 13 and 17mm (made in Japan and without eyecups) ?
Where I can find a "low profile" eyecup like that ?

Thanks,
Fernando

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It fits the older plossls such as th 10.5 13 and 17, and also the older Nagler 4.8 and 7 mm. Possibly others. I don't know how to buy a new one, but would try Televue for a start.

University Optics sells these in different sizes. I think all you have to do is measure the diameter of the barrel. He doesn't list them on his web site as it hasn't changed in years, but the advertisement in the back of S&T has them.
Should have all the sizes you need.
Jason