Moss carries a few brands and types...I haven't bought a top in a loooong time, I'll be going canvas when I do buy one though...just for the look! One thing you should check up on is the availablity of the Zip out rear window in a stowaway top....I don't recall ever seeing one....but definatly go for the zip out window even if you can't get it in a stowaway, I love it, it's great for those cooler days or when you can't be bothered to fold the top.
I don't mean to rant but, in my opinion one of the things that irritates me the most about these car is the top operation...Compared to American cars of a similar vintage our british tops are junk....When i had my 73 corvette convertible I used to look foward to dropping the top, becasue it was about a 30 second job...putting it up was equally quick and once up it actually kept you dry!...I dread putting the top down on my briths cars...you have to either put it down and keep it down for the season, or leave it up.