Acoustic Zen Crescendo speaker crossover capacitors ... who makes them?

I recently emailed Robert Lee, owner of Acoustic Zen, telling him that I was following a thread on Audiogon where certain people had upgraded the crossovers in their Crescendo speakers with superior boutique parts with excellent results. I didn't mention any names. I asked him if he would give me a list of cap and resistor values of the Adagio so that I could experiment with upgrading parts in my speaker crossovers. His response was basically, " Please don't mess with my crossovers. They are perfect the way I have designed them. I don't know why they want to change it. I would recommend that you experiment with speaker placement and room acoustics. Please call me for recommendations. Email me photos of your system and room." I thanked him for his response, but haven't followed up with him at this time. 

I am a firm believer in upgrading with better quality capacitors. I have improved my Reference 3a Dulcet and MMC crossovers with Audyn True Copper Max with spectacular improvements. I also have refurbished at least six vintage tuners by replacing all electrolytic caps with Elna Silmic II and Black gate caps with amazing results. I have no doubt that just replacing all the sand cast resistors in the AZ Adagio crossover would make for an improvement. 

I spoke with Robert Lee at Acoustic Zen recently because as I was attempting to extract the crossover boards out of my speakers(Adagio), there was so much hot glue under the boards that I damaged the boards to where they were no longer functional. I asked Robert if he could sell me another set, not mentioning that I was going to upgrade the caps and resistors, but he told me that he discontinued the 3rd order crossover configuration about a year ago and is building his own 1st order -6db crossovers for all his models. He agreed to sell me a set of his new crossover boards and before I install them into the speakers, I will upgrade for sure the caps. Robert said he would provide instructions for easy installation, this time using special screws instead of hot glue.
   I know this is an older thread but if anyone is interested in the results I get, I'll post back again later.