I have a set of the ICON rear 3" springs for sale. Had them on my 4th gen for about 6000 miles. Changed to Metal Tech springs.
Here is a link to what they are.
Pictures available but the attachment size on the site is too prohibitive. Condition is good with the expected bumps and bruises.
$225 plus shipping. Local pickup in Sacramento CA. Email
[email protected] if interested and want pics.