I got an estimate end of last season to replace all coming pads, helm seat, transom fold out seat, as well as the two cushions (backrest and seat) for the seat in the front of the center console and also the cushion seat that covers the two front storage bins at the front of the center console and it was approx. $2,000.
Keep in mind that like anything the price can fluctuate depending on the quality of the material used and if it is hand stitched versus not (e.g., I want the coming pads to have the lines in them as they do when they come standard from Grady, etc.) I've used this vendor before and am very happy with all of their work, so when I do get it done, it will be with them.
Hope this helps.