I have a window the the replacement shades broke on.

no big deal, super easy to replace.  The ones that are on most of the windows are kind of thin and wimpy but one window must have had them replaced already because they are a nicer heavier shade.

has anyone replaced their shades and do you know what brand might be heavier duty fabric?

just wondered if someone could lead me in the right direction instead of ordering and sending them back if they aren't what I'm looking for - But not super important to have done right away either if I need to do some trial and error.

I seen some at Lowe's in different colors and pretty thick.  I think around 40.00 for window in bed area.  They do have different sizes too and they just pull down and push up with no string. 

Thanks, I've seen those too.  We're about an hour from the nearest Lowe's but if we get up that way I'll take a look.

Jazztrailersales.com has great options available.  They are really helpful in ensuring you are getting what you are wanting.