Install WMF 5.0 on Windows 2008R2 32 bit

I seem not able to find any link to install on 32 bit version of Windows2008 R2 for WMF5.0, and hence not able to upgrade powershell on these machines.
Any suggestions?

Right here:

Server 2008 R2 only exists as 64-bit version on the market. Server 2008 without R2 was the last version which Microsoft released as 32-bit and 64-bit.