Is there any blanks being made that are close to the BCR 803 GLX blank? I want to build a 6'8'' Texas rig rod. I am also fine with buying a 7' blank and cutting it down to 6'8''. Any suggestions?

There is a St. Croix option that is close...  5C68MXF  It's rated Med but it's lure rastings match the BCR.  St. Croix's casting rods are generally rated lighter than Loomis and this Med. is probably on par with the Loomis MH.  That's all that I know of off hand.  I don't have an ATC catalog handy but don't remember one from them.  I've lengthened several 6'6" blanks to 6'9" and 6'10", it's easy to do if you have a scrap piece of blank with a matching taper... or a scrap that you can match a taper on. (by building the small side)  That gives you some other options.

If you cut down a 7' blank you make the action slower, not faster.  You can only speed an action by lengthening a blank from the butt... however that costs you weight (but betters the balance).  "speed" of a blank is measured by where the deflection takes place... the nearer the tip, the faster the rod.  So if you cut the tip, you actually remove the most flexible part and cause the blank to flex further back.  And if you cut the back (butt) you've shortened the overall length and caused the flex to be closer to the butt as a measurement which also is slower.  

Hope that all made sense.