Comment A few options (Score 1) 122
First, do you have a decent relationship with your former company? If so, good, reach out to someone there who might be able to get you authorization to contribute them back to the project
Second, if they won't or if you can't, reach out to the project and at least notify them of the bugs and I would assume you can provide the details of where they are located. You're already providing more than a bug report at that point which helps them more than nothing at all.
Third, work with another person to develop a clean-room patch so it isn't your exact work and therefore not your former company's work product.