Both HDS and novatac do take rcr. I vote for HDS, however there is a several month backlog on these lights due to the perfectionist nature of the maker. Look around the marketplace and post a wtb if you want one.
Another option is to get a surefire e1e and replace the stock bulb with kuku's / veleno designs led dropin. Takes rcr, and is the smallest setup I have (in case you don't wish to wait for HDS)
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pl. excuse brevity & possible typos - sent from a tiny device.
Are the sunwayman v10r ti, and the surefire T1A(2012 model) worth considering?
If you don't mind giving up low lumen runtimes.... infinitely variable control rings eat juice.
The regular v10r is a great light the Ti+ has some problems so you might want read the ongoing thread before considering it.