Been there , done that...along with some friends also. Those "semi custom" covers look GREAT in the ads , but you never seem to have the boat that it fits. I bought a cover from Overtons around 1997 or 8. It was a Hurricane cover made of "Sharkskin" . Best damned cover I ever had. Light weight and EXTREMELY water repellent. Fit like a glove ( not OJ's). They had over 6000 patterns. You give them the make model and year of you boat and it's made for yours. Took about three weeks and was shipped from the manufacturer in AZ.
Best part it was 1/2 the price of a custom cover locally
HOLY COW THIS MAKES 900 YAHOO>>>DOES 1000 make me and official post whore