Yes, there is a perpetual license version of “Lightroom CC 2015” available. Unsurprisingly Adobe named it “Lightroom 6.” The names are different, but the two are largely the same except that the non-CC (aka “perpetual”) version does not provide access to Lightroom Mobile and Lightroom Web.
Adobe is marketing the cloud subscription model with all its might so you may find it difficult to locate any mention of the perpetual version, but it does exist.
I’ll put up a direct link as soon as I have one, but for now Go to Adobe’s Lightroom product page, scroll all the way to the bottom, and look for the “buy now” button in the box for Lightroom 6 Standalone. You can also try using this direct link, which will add one copy directly to your shopping cart. In either case, it will default to the full version with a price (as of this moment) of $149.00. Once it’s in your cart, you can click the “Edit” button in the upper right to change it to an upgrade version for $79.00. Upgrade pricing is available to anyone who owns any version of Lightroom 1 through 5. These links are only for Adobe’s “ESD” (Electronic Software Download) version, which lets you download the installer online, but does not include physical media.
[Edit 1: Some have noticed that you won’t see the option to buy the perpetual version if you are logged into your Adobe account. Try logging out and then reloading the Adobe Lightroom product page. To clarify, this page will not show you the Buy Now option if you are logged into an Adobe account.]
[Edit 2: After changing from the Full version to the Upgrade version, you’ll need to tell it which version you currently own before you’ll see the lower price reflected in the shopping cart.]
If you take regular advantage of both Lightroom and Photoshop upgrades, you may save some money by subscribing to the Creative Cloud Photography plan.