It seems that some notebooks from Toshiba (and possibly other manufacturers) actually had ISA slots.

Various models from IBM support docking stations that had ISA slots.

Does anyone here have experience with any of this?

Some of the models I found:

Vintage notebooks with ISA slots
• Toshiba T4900CT
• Toshiba T3200SXC

Docking Stations with ISA slots
• SelectaDock III
• The Dock I (3545-001)
• The Dock II (3546-001 or 84G3587) 2 ISA slots
• Selecta Dock II
• IBM ThinkPad SelectaDock III