I hesitated too long over whether I could justify a new top from Hush, and then when I finally took the plunge, they had sold out.
I was gutted, so called up to see if any more were being ordered as I clearly have nothing better to do. The answer was no, but they suggested that I call back in case there were returns (which aren't usually listed on the website).
When I called back, they had a couple of returns in my size and I bought one on the phone!
So I pass this on, in case of use to anyone else.