Pete,
I've been looking into that as well and as far as I can find, there are no complete kits for something like this. However, Norbert Rauch makes semi-kits for a lot of popular airlines and they are the basis of many of the models that the builder of the A380 in your photo started with. You can find Norbert's website here:
http://rauch-airliner.com/Introduction.htm
If you send him an email, he answers right up. His kits include the fiberglass parts, i.e., the nose, tail, and nacelles. You can get the foam cores for the wings and tail cut by TDL Model Systems:
http://www.tdlmodels.com/
I've talked to them as well and they can CNC cut cores for any of Norbert's models.
The down sides are 1) its going to cost you about $1000 for the fiberglass and foam parts only. Then you have to buy all of the wood, etc., so putting together a "kit" will probably run into the $2000 range. 2) There are no directions, no plans, no nothing, so you'll have to engineer everything yourself including the turbine mounts, landing gear mounts, how the wings mount to the fuselage, all of it. 3) From what I've read, most of his models are more like P-60 sized than P-80 sized, but you'd have to check with Norbert to see how big the nacelles are.
The up side is that you'd for sure have a model that nobody else has!
Bob