Check Ebay. Or sometimes on Washington Fly Forums.
I had a 5 piece SP with two tips in a 6wt. Great big bug dry rod. I lost that rod in a fire a few years ago. It is missed.
I wish they would make the SP again. It was/is a great rod.
BTW..Here is an 890. Its in Sweden, but I am in Norway. So I could probably buy it, then ship it to you in December from the US.
http://www.ebay.com/itm/Sage-890-3-..._DefaultDomain_0&hash=item3ceaaf428d