Who has a 58-60 convertible in Massachusetts?
If you do not find someone who has a 1958-1959 Squarebird Convertible in your state, consider the following. Keep in mind that the 1960 convertible was considerably different to the '58 & '59 as far as the top operations goes.
The Technical Resource Library has the manual for the 1958 Tbird Convertible Top Adjustments, which probably also will apply to the 1959, since they were basically the same. Not so for 1960.
You may also want to buy the Top Repair & Adjustment Manual for the '58-'60 Squarebird. The Bird Nest has it for $7, Stock # MP35.
You may also want to buy the Body & Interior Trim Assembly Manual that Ford used to put together your '59 Tbird on the assembly line. Bird Nest also has it for $26, stock #AM62 for the 1959.