Yep, I am a dealer for Wild 1 and I have them in stock, Will save you a few bucks too!
As far as the taper goes the older style 575's had to be special ordered with the flat spot on both sides for the hydro clutch. the standard units did not have the flat on both sides. Now with the new style units they all have the tapered down ends to oclear the master cylinders. As Don said the big benefit in the newer tapered style is the range of adjustment for the controls. It is very likely that your dealer has an old pair on the shelf or just does not know what they're talking about.
Thanks to everyone. Got to the bottom of this (I believe) with Terry's help. Spoke with the parts guy again. He'd called Drag Specialities (who they normally deal with) and apparently spoke with one of their newer employees. He has it all straight now. I suggested that I could purchase the bars and have them install, but they will only install what they sell

. Not a problem, since they will give me a 20% break on the parts and labor. I'm okay with that. Would much prefer to keep my business with the "knowledge collective", but for the stuff I'm getting at delivery, pretty much have to go with the dealer's rules, but I'll be back for more "stuff". I'm getting that OCD urge

.
Again, you guys are the best and thanks for all the help,
Tony