Tango, I don't think any of the Isuzu gears have a longer "input" shaft than what you (we) have. Slap a "u" joint from another 3 joint column in the middle of your intermediate shaft along with a pillow block for support and you're golden.
Opus, that intermediate shaft is exactly what I started out with. I'm not sure Tango got that when he bought his gear and column support but it bolts right up to the Isuzu steering wheel on one end and to the gear at the other. By the way, a buck and a half seems to be the going price for a gear around here too.