Be sure to research these retailers at ResellerRatings.com before you buy:
1COOLPC
(http://www.1coolpc.com) offers fans for all CPU types, rounded cables, water cooling kits, lights and window mods, thermal compound, video card coolers.
PCMods
(http://www.pcmods.com) offers cases and case accessories, fans and fan accessories, lights and window mod kits, control and monitoring devices, hard drive coolers, noise reduction and sound absorption products.
Highspeed PC
(http://www.highspeedpc.com) offers water cooling kits, quiet power supplies, Athlon XP multiplier unlocking kit, high performance fans, pre-tested high-speed DDR memory, case windows, lights and LCD mods.
3DCOOL
(http://www.3dcool.com) offers CPU, laptop, and monitor (display) coolers, chipset fans, hard drive fans, RAM fans, silent fans, cases (clear and aluminum), temperature monitors, round cables.
Xoxide Modifications
(http://www.xoxide.com) offers water cooled cases, water cooling kits, water cooling accessories, case lighting, CPU coolers, case fans, standard and modified cases.
