How diffcult is it to change a convertible top
 

My stock black top one has spots all over it so it needs replacing. My car is white and when my car is repainted I'm going for the solid white look so I'm looking for a white top. I was wondering how hard is it to change the top itself? Also can anyone recommend a site that sells good quality tops? The prices the dealers are quoting me are outrageous to say the least.

Thanks

take it somewhere, check with the regular parts places paddock, classic industries. Last top I did took 5 tries to get right with no wrinkles