SHO Source is BUSY. They are the only dedicated business supporting SHO's.
Send SHO Source another message.
Are you on Facebook? There are several reliable people there that sell parts. This is the place to go for parts.
I have never seen a sloppy steering column bearing. Anything is possible.
I have seen a cracked column housing, which did not hold the steering column snug.
Crawl under the dash while another wiggles the wheel. Attempt to pinpoint the slop.
Coilover spring manufactures will advertise spring height when compressed.
You need to calculate your total travel, and determine if your spring height allows enough travel.
8-10" spring heights work best on SHO's