Vinyl interior tears- best way to manage without replacing?

There used to be kits for repairing vinyl but they are hard to find you fill it with a goo that you iron to cure and there are tricks for matching the grain , My aunt in law had one and got so good at it that all the car guys used to track her down to fix there rips , they used to sell them on tv from like Ronco or someone like that and I haven't seen them in years myself but maybe someone knows a source .