I'm in Greenland NH.
I am considering a top for my 2310 from Redman marine fabricators in York Maine.
I took a look at them last week. They have a nice fiberglass top (Room for electronics) and thier custom welding is top notch.
A ballpark price is $4800 for the top installed and $1400-$2000 for side curtains.
I know it is alot of money but I'm not holding my breath for a used top.
Feel free to contact me.