Samadhana, a lot more than $1500. Try $4000. Unless you are game for a total rebuild without any assurance of what they will sound like in the end I think you are best served with a new set. They served you well.
The Tweeter is a Scan Speak unit, the woofer I am not sure about. It is a transmission line enclosure which effectively doubles the size of the woofer. So, you are looking essentially at a two way speaker with a 12" woofer. Transmission line speakers are rare. They are difficult to design and expensive to built. The only one available now that I know of is the Sander's Model 10 which is not going to be your cup of tea.
I think you have a lot of listening to do!
The Tweeter is a Scan Speak unit, the woofer I am not sure about. It is a transmission line enclosure which effectively doubles the size of the woofer. So, you are looking essentially at a two way speaker with a 12" woofer. Transmission line speakers are rare. They are difficult to design and expensive to built. The only one available now that I know of is the Sander's Model 10 which is not going to be your cup of tea.
I think you have a lot of listening to do!