Use 2 component epoxy glue and see if it holds. You might also buy a car real rim.
Hmm, I might modding my G25 stock wheel rim to 13 inches Momo wheel rim. 💡 Give me a better idea..
You can convert a G25/G27 to a car aftermarket wheel. There are some converters around the web (I think in chilicoke's ebay and in DerekSpeareDesigns website) so you can screw the new wheelrim to the Logitech wheelshaft and I know that DerekSpeare also sells a solution so you don't lose the buttons on the wheel.
Wheel adapter http://www.derekspearedesigns.com/Wheel-Adapters.html
Plate with buttons for attaching to the wheel http://www.derekspearedesigns.com/Mini-Plates-for-G27-Wheels.html