sounds like a draw from a compound, are you sure about the draw,,??
any flat bow design will work if you design it to fit the draw,,
I would recommend backing it,,
66 inch for 28 inch draw
68 for 29
70 for 30
72 for 31
74 for 32
these are just rough starting points for the length of bow,, and a bit overbuilt
but in my experience,, when you give a bow to someone, best to overbuild it to make sure it never breaks
ok to experiment on how short you can go on your own bows
that being said, I would not make a long non working handle, if it was me, I would have it bend slightly in the handle and keep it simple,, like a Native American war bow,, or "D" bow,,
you have lots of options ,, that is just what I would build,,