steering box

[67cruiser]

I've got a 67 c10 and my steering box is real loose. I've posted a thread about it a couple of weeks ago. Well I tried to tighten it up but that didn't seem to work. Also somebody told me to check the fluid level in it but can't break the bolts loose not sure even if it was low if it would solve the problem. So I was wondering do they sell a rebuild kit for these or is it not worth the hassle. Should I just go buy a new one , they are very pricey or is there another model vehicle i could pull one at the scrapyard and use it. Or does anybody got an extra one they are looking to get rid of. Thanks!