74 Westy. USA North Carolina. My current top is bowed out on sides. Also looking for replacement canvas top OEM greenish color canvas for Yosemite Yellow paint. I've already tried GoWesty, BusDepot, etc. I think will need custom made unless some knows more. Thanks much...Wade
Hello and Welcome from The Colonial Contingent Can't help with the canvas except to suggest speaking to your friendly local motor trimmer.
I've seen a few good ones on EBay but they are not cheap £1500-£2000 complete with canvass, struts and roof chop or £1000 just for the fibreglass
Welcome to the forum, nice looking bus! Here is a link to Poptop roofs here in the U.K.: http://www.poptoproofs.co.uk/shop/product-info.php?id=30349 I guess shipping to the US may be an issue, maybe asking the same question on thesamba may get you a result?
Lovely bus - the best colour Have you got a pic of the roof where the roof is bowed as mine is the same and I have been advised some gentle heat and clamps might help mine so it might be the same for you?