A recent quote came in at £2800 (UK) with new frame and sprayhood for us. We will fit one eventually but not just yet.
The other option is a removable bimini
. The sort of thing that fits on a speed boat
. I found one with rubber feet that fits perfectly and cost us £160. Does quite a good job of keeping the rain as well as the sun off. However, it does get in the way of the main sheet as a full bimini will.