Single slot GTS and GTX cards are very rare to be found in normal retail and only appear in very small numbers. I wouldn't be surprised to find out that they are only for special order. So call up the manufacturer and ask ware you can purchase this card even if it is available at all.
I'll never run Sparkle even though I like nVidia more than ATi..
No Sparkle, Palit, PowerColor, no Zotac, EliteGroup either...
you really have it out for some manufacturers, dont you? Ive owned powercolour and elitegroup(motherboard) and havnt had issues with them. I know many people who have had sparkle vid cards and not had issues.