im not sure if this helps you, but i fabricated a custom engine mount for an old crappy truck i have that i dont want to spend any more money on.
i got a pice of aluminum block stock from a project im getting into (anodizing).
point being you can fit anything into anythin gwith the right amount of fabricating. just look at the twin engines trucks for that matter.
i dont knwo what your skills are or what tools you have so this might not help you, but figured i'd add my 2 cents.