I have two lenses listed on ebay, both are Exakta mount (EOS, NEX, M43) and are ideal for aperture pulls.
Domiron
http://www.ebay.com/itm/130902773154?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fm.html%3Fitem%3D130899559395%26pt%3DUK_Lenses_Filters_Lenses%26_from%3DR40%26_sacat%3D0%26hash%3Ditem1e7a38c3e3%26_ssn%3Dtransferconvertcouk%26_nkw%3D130902773154%26_rdc%3D1
Flektogon
http://www.ebay.com/itm/130902773057?ru=http%3A%2F%2Fwww.ebay.co.uk%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D130902773057%26_rdc%3D1