Yeah, SPS6 has 32 bit version REGI
At present you can download it only from SAP Marketplace :
Even Thomas has mentioned the complete path in thread :
http://scn.sap.com/thread/3281439
http://service.sap.com/patches
Then Browse our Download Catalog
SAP In Memory (SAP HANA) ->HANA Platform Edition -> SAP HANA PLATFORM EDITION->SAP HANA PLATFORM EDIT. 1.0 -> Comprised Software Component Versions.
Within this list you will find the HANA Client and HANA Studio.
It has been mentioned in many threads that SPS6 will contain 32 bit REGI file\and even in the above mentioned thread Ralph from SAP confirmed :
"Hi,
we'll provide 32bit Regi clients for both Windows and Linux with SP06.
If you are an SAP employee, please ask me via Email where you can download preliminary 32bit versions before SP06 is released.
Cheers,
Ralph"