1978 CJ7 Steering Gear box question

I need to purchase a new manual gear box and wondering what options are available. Looking at a Crown from Morris 4X4 (Check out the link below). But, wondering if there are cheaper rebuilt ones out there somewhere? Is Crown a decent gear box or are there better options.

http://ift.tt/1OCy6l3

1978 CJ7 Steering Gear box question