re 3 phase. what kw rating are your drives? do you need full drive output power?
re isa. you can still buy motherboards with isa slot. (i buy some from china when i need them)
(thats why the 1700 cards are so cheap, but they work just as good)
however the galil can be stand alone ethernet controllere (models 2100, 2200)
pci bus (1800)
these are the older galil cards.
they now sell the much faster accelera cards and stand alone controllers too.