Hi Jim,
When I had a 16' Longliner I had no cuddy (I was much younger and tougher

) but I toyed with the idea of making a shelter - a bit like the larger cobles use on the east coast. Basically a mast or beam fixed to a shackle at the prow and running back towards the stern. Prop the mast up, either from the deck, middle seat, or sides, and have a tarpaulin or canvas cover stretched over the mast as far back as you want.
Take it up or down as the weather dictates.
You may need a couple of cleats on either side to hold it in place.
Just a thought if you can't find a dodger at a reasonable price.
DB