www.iso.org
"We're ISO, the International Organization for Standardization. We develop and publish International Standards."
That is what I think of when I hear or see ISO.
RockAuto parts has a long block/complete reman engine for $2827.79+$435.00 core listed. Check your local parts store or salvage yard as a lot of the salvage yards sell re-manufactured engines or used ones; what ever fits your price.