A question about modern roof vents. I am replacing the roof vent on my '87 Autohomes, the smoked crystal perspex bits have cracked with age and UV and are a leak waiting to happen. On removal the roof aperture exposed is 360 x 360. All the new Fiamma stuff in the right general size area starts with an aperture of 390 x 390. I'm not overly keen to have to cut a larger hole in the roof as this means a whole load of other messing with the internal supporting timber frame structure etc.
Does anyone have any leads to a modern replacement that will drop in without roof mods ?
If the game is up and I do need to get out the saw, any leads to the most stylish aerodynamic replacement much appreciated. The Fiamma kit is a bit square and chunky for my liking, but caravan vent designers seem to be a very conservative lot

Having said that, this does look quite good http://www.campervanaccessories.co.uk/c ... -1158.html" onclick="window.open(this.href);return false;
Cheers !
Dave V