They are TOUGH to find. I had a 1765 a few years ago that i bought new. I didn't buy the front deck because it was so expensive. I looked for months to find one, never did.
I ended up building one out of plywood glassed over. There is a gelcoat additive that gives you the splatter effect. When it was done, it looked very close to the factory front deck only mine was probably beefier. The problem is, i spent as much or more building it as it would have cost to just buy one.