If you have a 150 horse or more, here is a fixed setback plate from Panther Marine that might do what you want.
I'm not sure but it looks like it does the above meantioned.
http://www.panthermarineproducts.com...php?sku=550240
Set-back Plate Model 240 (4in) Set-back Plate Model 240 (4in)
Set-back Plate Model 240 (4in)
SKU: 550240 An innovative flared shape allows this four inch set-back bracket more transom contact area to reduce stress and improve the motor's stability. The two piece, T-6 heat treated. 1/2" anodized aluminum bracket will work with even the most powerful main engines. This is an inexpensive solution to lagging performance, while maintaining maximum durability. The pre-drilled hole patterns allow for an extensive range of motor installations.
BIA bolt patterns apply. Bracket mounting dimensions:
3" motor side x 13"
4.75" transom side x 13"