Michel, some remarks to your 907.
Of course, it's a task to "reproduce" this type of car.
Is it enough ? That's all the point!
For me, owner of a "works car", certainly not.
In a way it's a tremendous job, in another it's just a fake, were the most significative parts are not respected...in the design or the matter. Titanium is very expensive today so I can understand the problem. For certain parts as rear lights, it's too easy to adapt bad parts ... for the look but you are exposed to the laugh of those who knows that they are very easy to find today. You say you find parts through Chris Melia...He seems not to be the right horse !
They are guys actually who are much much precise and who respect the design and utilize the right process.
Your car value is for the best 50 000 $, a real one 2,5 M: isn't it a good resume ?