I hope you can find a replacement LR2. I will continue searching, and post any link I find on this thread. So far, the only one I have found is the men's size 6 on Ebay.
Since LR2s are discontinued (and have been for quite a while), perhaps it's time to try something else? Since the lunar style worked so well for you thus far, the Lunaracers have gone back to their original design, and are available all over the place.
Another model that is of interest (although it ended up being too soft for me) is the Lunar Montreal. Zappos dot com has a good selection of colors available. It too is discontinued (or will be very soon)- but will be available online for the forseeable future; so if you find that model works well for you, stock up now before they eventually disappear like the LR2 did. Of course they have the lunar midsole, and are VERY lightweight, noticeably lighter than the LR2.