Ability to export cars already in development in campaign mode

I made a car for a campaign that I would really like to either put in sandbox to further modify or export to beam, but I’ve already signed off on the project, so I can’t re-edit the trim, and no matter what I do, I can’t seem to make my company survive until the development of the vehicle completes, so I can’t export a facelift. Is there any way I can either copy the car somewhere else and then export it from there, or cheat enough funds in to keep the company afloat so I can export a facelift? Any help would be greatly appreciated. Thanks.