why yes as amatter of fact i'm in the final stages of a hardtop resto.
it's a fairly simple matter to handle, assuming you have atleast a basic knowledge of metal working.
of course handling the fibreglass (with NO metal on it!!) carefully is critical.
i'm using a top off a 70/40 and the holes, in the Fglass were pretty "rotted". so when i went to mount it on the driprail i drilled new holes in the glass.
when i made the new d/r (i used ccot pieces) i used the old d/r as a fixuture to assemble the new stuff, and get the hole locations for the holes that mount the glass and driprail to the sides.
before i finish welded it , i checked the fit of the fglass on it.
as of now i have not assembled all the top parts(sides to the fg, dr unit) when i'm ready to put the top on for winter, all i have to do is fit everything togther on the cruiser.
the old fiberglass is a pita. it took me forever to get it right with a newly fabbed raingutter, and then the glass split real bad when i picked it up on one corner to look at the inside. :-X
good luck guys. if you have the capabilities, i would say make a new raingutter yourself, ccot will rip you a new one if you have to buy it. it really wasn't that hard for me (i'm no good at metal work and i only did the front half). only took me two tries to get it right (the first one wasn't square enuf).