I've had this a few times - after last week the game deleted my Carbon' fromm the garage. Yes, that still happens
My advise is to look out for the pale brown seats of convertibles, then simply: STOP LOOKING
I know but seriously, everytime i gave up, i found it. Sometimes the harder you look, the more you miss.
True story. Like I said above about getting a Comet. I got it, stopped looking for Carbonizzare, found it instantly when I "didn't care" to find it lol. Why do you guys lose cars? In the whole history of my game, I have not lost anything but the Space Docker which I could care less about, honestly. And this was before one of the patches. Now all my stuff is stored and I don't do any more game saves. So everything stays the same. I also don't really use the cars in my garage, I want to have them to just look at and to know "I have them and can use them at any time." It's silly, I know, but it's my game, idc. Lol