2010 Abu Vendetta blank, does anyone know what blank (available to builders) eg. RX-7, IM-8, IM-6 etc would compare to it?  In other words if you wanted to replace such a blank with the same characteristics, where would you turn?

Retailers and manufacturers are understandably tight lipped about such things. Your best bet to get a blank with the same characteristics is to send the rod to a rod builder familiar with the Common Cents System (CCS) have it measured and match it to a new blank. Not being a really unique blank in the large scheme of things it would be easier to just describe to the best of your ability what you'd like in a blank and take suggestions. 

Thanks Mike, I do my own building, and I guess I'll have to get set up to do some comparisons for myself. I've got a reel for you to service in the near future, getting ready to send it out. Thanks, Lynn