It's probably not actually in the source code, but in the .vstemplate for the item template you're trying to add.
Yep, I just checked. There's a reference to v9.2 in the .vstemplate for the DevExpress Standard Form template. In the VisualStudio\Common7\IDE\ItemTemplates\VisualBasic\StrataFrame folder you'll find the SF_DevEx_StandardForm.zip file. That is the template file.
1. Extract its contents and edit the .vstemplate file (it's just an XML file)
2. Change the version on the required reference to the property DevEx version.
3. Put the files back into the .zip file.
4. Open Visual Studio command prompt
5. Run "devenv.exe /setup"
You're template should be fixed.