Doubtful. It seems to me once or twice their shell was included in a sale, but it's been a while. Try Sky Valet for a limited selection at 20% off.
There's also an ebay seller in the UK who sells RLPL, etc for a discount. http://www.ebay.com/sch/sausages234/m.html?_nkw=&_armrs=1&_from=&_ipg=100&_trksid=p2053788 and the rlstore on ebay.