O.K., I am at a loss to understand why any of you can't spend $30.00 to buy a gallon of the best glue on the planet. If you use half of it, all of it, or none of it and throw the rest away are you still not in the same place financially? If you can find an upholstery shop that will sell you less than a gallon for $30, and you need more to complete your project, where are you at? If this was a question of spending $5 more to make your paint job, transmission, engine, or whatever there is to spend on your project of a lifetime, would you spend the $5.00 or not? This, my friends, is the definition of a no brainer.
Why is the interior of your car, where you will spend 100% of your time when the car is finished, the least important thing you spend your money on?
If I had a nickle for every $10,000 paint job on a car with a $500 interior that I have seen, I would be one rich sum*****.
No one lives forever, the trick is creating something that will.