Manual Steering Options

I am thinking that while I am have my motor out, I would like to convert from power to manual steering. What are my options???? Here is what I think they are with some questions... Any help or input will be greatly appreciated.

1. Flaming River Manual Box and coupler. Where is the best (cheapest) place to buy.

2. OEM 20:1 Box. Where can you buy?

3. OEM 16:1 Box. Where can you buy?

I have looked at both Steer and Gear and Firm Feel and they do not list manual boxes anymore in the faster ratios. Just 24:1

Thanks,