Houtex,
Check out
http://www.malkoffdevices.com/
Gene Malkoff makes some very bright drop-ins, both for SureFires and Maglites. His products are very much in demand by the people here, and he has a somewhat limited production schedule, so you may have to wait awhile to be able to buy what you want on his site. You can click on the product you want, and if it is out of stock, you can 'sign up' to be automatically notified by e-mail when it is back in stock.
His products also come up for sale on the CPF marketplace.
You might also want to consider replacing the easily-scratched stock plastic lens with a quality 'UCL' or 'Borofloat' lens from a site such as lighthound.com, which will increase the efficiency of the light transmission out the front.