I would start off by contacting one the FBO's at Palm Springs Airport and asking them if they have any ideas. I wouldn't abandon hope without trying. Here's a link with everything you could possibly need to know.
https://www.airnav.com/airport/KPSP
As for Van Nuys airport went in and out of there twice, apparently messed it up, although all I did was follow ATC instructions, got the letters with "you were here, when you should have been here blah, blah, blah...." so avoided going there again after that.