Sleeks advice is good. I will answer your question as best I can. You can make either an...
A. Static non working handle. It doesn't bend at all, and has flair outs that are the transitions from the narrow handle at 1 inch wide or so to a wider working limb, say 1 1/2 inches wide. Your flair out happens over that short area at the fade, 1 1/2 to 2 inch area or longer as Sleek is suggesting. This gives you two working limbs separated by the static handle.
B. Bendy or working handle. The grip area is often the same width as the working limb. You can narrow it some for comfort sake but you wont need flair outs like you have above. The handle works (bends) so that you have in essence one smooth bend from tip to tip right thru the handle.
I think "B" will solve your problem. Having said that, Sleeks idea may work also. Long slender flair outs so that you can get past the split. Better pictures with more detail and dimensions will help in offering better advice.