Phil,
I just ran across the Phoenix 1/4-scale PA-18 Super Cub Model. They offer several parts including a wing strut set. Price is pretty high at $57.99. I have no idea whether they will actually fit or not. The wing span for the DPM is 105.5, if think, the Phoenix model is listed at 107".
https://www.towerhobbies.com/cgi-bin...I=PMMA1695&P=Z