Wayne Gretzky 3D Hockey replacement psu?

[emuola]

Got this cab a while ago and it works great However I have a few questions on the pretty noisy (I mean a rumbling sound) psu. As it can be seen in this picture the psu is a standard? AT-psu. I thought to replace it with a standard ATX-psu, but the connectors are not standard at (at least afaik). Is there any *easy way* (meaning not to cut/replace any cables) to hook up a ATX-psu? I know there are at-to-atx adapters, but they don't fit here

Whole cab from the back:

https://onedrive.live.com/redir?resid=C769995EB0B2279B!38578&authkey=!AJ_7xNC4TBOLpss&v=3&ithint=photo%2cjpg

psu connector:

https://onedrive.live.com/redir?resid=C769995EB0B2279B!38577&authkey=!AIXiYYSZM-lZDx8&v=3&ithint=photo%2cjpg


Why does the monitor have its own psu (under the at psu)?

[nitrogen_widget]

When the bearings in a PSU fan go I just open it up & put a case fan into it.
Since the fan inside the PSU is usually a 110v AC fan and case fans are DC I let the connector hangout of the case & just hook it up to one of the PSU connectors.

[emuola]

When the bearings in a PSU fan go I just open it up & put a case fan into it.
Since the fan inside the PSU is usually a 110v AC fan and case fans are DC I let the connector hangout of the case & just hook it up to one of the PSU connectors.

I'd like to change the whole psu, because it's rather old (running since 1996...) Can someone identify the connector(s)/wiring compared to standard at?