A complete conversion of the industrial plant is often a costly affair. Continue using your ISA card for a few more years: we still have motherboards with ISA slots.
The IM-P4LA is a reliable industrial motherboard with 1 ISA slot, 4 PCI and 3 PCI-Express. So even cards according to newer standards can be used. It is suitable for use with Windows 2000 . Note: the drivers for your card(s) must be present for the system of your choice.