I know, what you mean... have also spent a lot of time for a excel list of a lot of cars in gt5 with wheelbase and trackwidth... but if I can help people with my knowledge of that, I´m happy... if the first people of hybriding didn´t share their knowledge with us, we weren´t able to do it, so let us help each other... we have the same hobby...
you have found a fitting chassis? hey, their are only a few more than 1000 chassis in the game... and a lot of them don´t fit because of the wheelbase...

so it´s not a big deal to find the one you have found... it´s only a little search...
hope you don´t get me wrong, I know, what you do, but it will never be complete unique...