Are your eyes blue?
Just kidding! You have several options, the way I see it: a) Go on eBay and look for a nice vintage set. b) Go to the Jewelry Exchange in Woodland Hills CA, which has a stunning octagonal pavee pair with diamond surround, except I'll kill you if you buy them out from under me (although, since they made them there, I can get another pair made.) c) Look for ladies' sapphire pendants in simple geometric design and have links made from them. I did that, and they came out very well, especially since my jeweler found nifty white gold backings for them. d) Design some yourself and have them made up. Sapphires are not that costly, especially if you use small, flat stones fitted together "pavee." Rectangular or square-cut look fairly masculine in a plain geometric frame. Be aware, though, that there are man-made stones out there that look pretty much like the real thing, although I suppose they would do if you're not too particular about that.
Remember, sapphires come in different colors (here's a yellow gold pair with yellow "princess (square) cut" sapphires at a "sale price" of $3,725: https://www.jewelbasket.com/jbly725y.html
Oh, and did I tell you that you could spend a lot at this? Designing your own, if you can find a good wholesale custom jewelry maker, or copping ladies' pendants could be less.