Hi,
I assume 8.5 instead of 8 will do as well? My advice is to concentrate on the series Hiyoshi made for Swift from 1985 on. Issued in the USA are the Audubon, the 8x36 Hunter and the 8x42 Saratoga (in Europe more models were issued). However, I would also seriously consider 7's, for instance, the 7x35 Sport King and the 7x35 Neptune are very good. Note that these are all equipped with rubber eyecups. If you want Swift you'll have to accept their fine roll-on roll-off rubber cups.
Renze