4.0.1.8320161 was removed from the support pages and is not available for download. I believe 4.0.1.8404134 will be re-posted soon. If not that code, a variant. Please stay tuned and download new code when it is available. 
Where can a partner download the following Unity OE 4.0.1.8320161? its not available on support.emc.com site the only available upgrade OE is 4.0.1.8404134 with a warning message " Temporarily unavailable"
Unity OE 4.0.1.8320161