I have done a number of searches with different terms but no luck. Can someone provide me with the schmatic for the crossover network of an L-36 3-way system?

I just bought a pair off of ebay to scavenge parts, especially the L-Pads and little knobs to convert a pair of L-88P 2-ways to 3-ways.

Out of curiosity, what type of capacitors (with the brown paper covers) are used in these networks, non-polarized electrolytics?

Thanks,
John Lovda