Sandboxed Solution with Localized Resource Files (.resx)

I have to move to a Sanboxed Solution (365) and I have some localized resources in my webparts. 

I have tried many different approches without success.

The Resource files cannot be stored in the HIVE in a sanboxed solution so they must be moved to the site collection somehow or inlcuded in the assembly.

I have tried to use this funcition below to retrieve the Resources but it didn't find any translation.

 Public Shared Function getLocalizedValue(ByVal strInput As String, ByVal intLCID As Integer) As String
        ' Function to retreive specified Language Variation Value
        Dim strLocalizedValue As String = ""

        strLocalizedValue = Microsoft.SharePoint.Utilities.SPUtility.GetLocalizedString("$Resources: " & strInput, "Resources", CUInt(intLCID))

        Return strLocalizedValue
    End Function

I have to files named Resources.en-US.resx and Resources.sv-SE.resx.

Please let me know how to be able to get the text localized to a label.

For example

lblSubscribe.Text = getText("Subscribe").ToString

Thanks!!!!