I used to have a board - I think it originally belonged in a Packard-Bell PC- that plugged into an ISA slot and had 3 ISA slots on one side and 2 on the other. I tried it in my A2000's farthest ISA slot and it did work... gave me 2 extra slots, since it took one and I could use the three on one side.... of course, those cards were hanging in mid air, and the case wouldn't go on. ;-)
But it worked. ;-)