I have a 30 roadster also.I dont know whether you are asking about the canvas top only or whether you are looking for the entire top framework also.Mine was missing the entire top assembly when I got it but I was very fortunate to find an original in very good cond.I made new wood bows (had the original bows for pattern) I have not yet completed the top upholstry, but I did recieve an exact pattern copy from a fellow who has done an award winning restoation on a 30 roadster.I made a canvas copy of it and tacked it into place to check the fit and it fits perfect.the 30 and 31 top assemblies are entirely different one from another.a 29 dodge top is very similar to a 30 chev top assembly.