AR10pi - re-cone myself, sell as-is, value?

Nice pair, purchased new by my father circa 1975 for $800. Cabinets excellent, woofer cones with classic rot. Possible deterioration of mid-domes too but let's get to that later. Original foam grilles in pretty good shape. Everything else is original - badging, the doors covering the front level adjusters, etc.

The questions:
Re-cone myself? (by which I really mean 're-surround')
OEM sources and prices for new woofers?
Thoughts on value of pair as-is vs. re-coned vs. with OEM woofs?