Hi, I would not re-use the vinyl. First you will not get a smooth surface, plus it will probably not fit as you wish, you will get as well a lot of glue stucked on the vinyl.
You get get a new top for only 115 USD at CJ Pony, and some glue spray. Watch that you apply proper glue, otherwise you will get an uggly surface, I know...
I used glue from 3M, but other spray glue will be goo as well I guess.
I did it myself, it cost me a few hours on a saturday with 2 persons.
I'm in heaven with my '67.