Here are two 30x 3 1:2 rims for sale 60 spokes. The outside surface of the rims looks great, but the rims are a little sharp in some spots. They could probably easily be filed down or brazed / welded up. I think these still have life in them.
$225 plus shipping
Been told that they are later pasco wheels
$200 plus shipping
$175 plus shipping
$150 plus shipping