link to download SDK v 5.2.0

where can I download SDK v 5.2.0? Raytac told me they tested their module with SDK v5.2.0 and S110 v 6.0.0

I need to test with this version because I'm unable to make SDK 6.1 work with S110 v7.1 so I would like to see if the module works with an older version.