Rorio,
If you decide to scratchbuild one, here is a good working plan of the DFS 230. This will need to be sized to the scale of your choice (I used photoshop). Print several copies. Carefully cut out the fuselage, wings, rudder etc. and then glue to your wood boards. At this point you need a coping saw or band saw. Then file, sand shape and assemble your glider!
PM me if you want more instructions.
John