One way to go, into which I was forced after I bought a kit and discovered it was too small for my purpose, is the buy the kit and then use the bits to give you the shape of the bulkheads and stem/keel etc. I placed them on my flatbed copier and used my computer to double up the size.
I note there are two fishingboat kits, one by a French outfit of which I dont have a name except the story was in MB* ….Le Maraouin .. and the other is an Artensia Latina Hellen Kit
I guess that both are carvel planked so it would be up to you to clinker plank them.
*My index relates to our Club Library numbering system so short of going across town to the Club I cannot work it out. [Will do that on Thursday].