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


I own the MKl version of the Crescendo and see the crossover uses all Acoustic Zen branded capacitors. Most are blue in color with the smallest values bring black. Does anyone know what company makes these for AZ? I did email the builder, but no answer. Love any information the community may have on this topic. 

128x128grannyring
Ok, I finished the upgraded crossover board and just installed them. A ton of work. Imagine replacing caps that are 1/2 inch in diameter and 2.5 inches long with caps almost 6 inches long and 4.5 inch diameter! Had to get it all to fit into the same space. Initial results seem most excellent. The thing I noticed within 20 seconds was the absence of noise, music flowing out of a dead quiet backdrop. The difference over the standard crossover is astounding in this regard. Already I hear more resolution combined with greater space, body, texture and improved natural tone. I also hear a greater sense of ease and natural flow. Only 2 hours thus far. I will report back after 24 hours.

i will try and post pics in a link as you have to see the before and after.
There is also an additional board on the very bottom of the speaker that I have not touched as yet. It is for the bass drivers. Unfortunately it contains two 1000uf electrolytic caps! The two resistors on the bass board are sand cast and will be replaced with Mills MRA 12. As for those 1000 uf caps I will think on my plan of action. I cannot believe how many parts are in this crossover. This is not your simply first order type.

I believe it is a 3rd order Linkwitz/Riley design.