If you're looking for King Cat ones, they're likely pretty scarce. I'd look for a complete take out suspension from an M-series with the float suspension. With a little work, they go right in and are a pretty decent upgrade.
I second what IDCATMAN said. I put an m skid in my sled and loved it. much easier than buying new rails IMO. I don't think the Zero Pros are that bad either.
good luck!
I ordered a new set of iceage rails for my KC9/162... 2 yrs. ago.
They came in about 2" too long. We trimmed the front and they're working fine but I was disappointed and really glad we tested before loading up and heading out.
Ok so the consensus is swapping a m162 skid. How much modification is needed for this? The 162 proclimb rails might be a good alternative, but again I'm pretty new at this stuff so not sure how much modification is needed. Thanks for the help so far.