custom Crossover building service??

Got a question- does anyone know of anywhere(a business I guess) that I could send one of my speaker's crossovers to, to have better/custom ones made up? Basically, they'd duplicate it with much better components. the stock one is a little chincy thing that is hard to figure out. I can't see the inductor values and the signal path is confusing.
i contacted Athena the manufacturer of the speaker and they will not provide a schematic. if they would i could just build them myself.
thanks