Anodized vs. non? - Aluminum vs. filon

Hi,
We're in need of 6ft wide aluminum (by 10ft long sheet) and are having a hard time finding it. I've been told that it's best to get Anodized aluminum as well. For these reasons alone, we were thinking of going with filon instead....but I just talked to someone who said that filon has a hard time sticking and is trouble down the road.
We had a trailer frame built and they built it at 61" wide...making our build a lot more problematic....and more waste! Anyway, it would be great if someone out there had some answers! We do not want to have seems on our roof....a 10ft sheet would get me to the hatch (it's 9.5 ft)....but it needs to be 62" wide (due to walls covering the sidewalls).
Help!!!!!!!!!!!!
We're in need of 6ft wide aluminum (by 10ft long sheet) and are having a hard time finding it. I've been told that it's best to get Anodized aluminum as well. For these reasons alone, we were thinking of going with filon instead....but I just talked to someone who said that filon has a hard time sticking and is trouble down the road.
We had a trailer frame built and they built it at 61" wide...making our build a lot more problematic....and more waste! Anyway, it would be great if someone out there had some answers! We do not want to have seems on our roof....a 10ft sheet would get me to the hatch (it's 9.5 ft)....but it needs to be 62" wide (due to walls covering the sidewalls).
Help!!!!!!!!!!!!