Infinity cs 3009

You won't find exact replacement parts to build a pair of these.  The pair that Erik recommended is excellent although there are a ton of lower cost alternatives.  If you are interested, let me know and I'll be happy to provide you some designs.  
Tim 

@okeeteekid

I’m sorry to disagree with you, I am very familiar with Kappa crossovers impedance curves and sound. I have sold them new and worked on them since.
Peter @ PBN did the speakers that Erik posted, I’d take them any day over Kappa’s, they won’t be dry rotted anytime soon and any solid state amps and many tube amps can drive 
them.

@okeeteekid 
I have no argument that the Kappa's are nice speakers and can be incredible with the right amplification, but have to assume from your response that you don't like the sound of those paper mids that you haven't heard them. 
The paper on these mids are coated,  next, the problem that most people have with paper is how you can hear paper resonate,  some love this, others don't.  The slits in the cone, stop the resonating from spreading and moving around the cone,  then the slits are glued with a pliable material that further dampen the cone. (paper is normally more detailed sounding than poly - not always) 
Lastly, with proper crossover changes,  I really like the Kappa 8 & 9 both, many of their issues can be solved, but no matter what, these speakers have aged and the poly domes are shot and all Kappa woofers are ready for at least a recone.