What level of mold do you want? Because theres companies such as
NFb Molds and
FB Molds with prices around 250$, but they are the top of the line metal molds.
Or you can go with a cheaper alternative Gator mold found
here , but I'm not sure how wide their molds can get too. Theres also the ultra cheap way of making a custom 34-35 Bondo mold, but that takes some time and dedication (known from experience) and doesnt always turn out the way you want and takes multiple attempts.
So it really all depends on how serious you are about your mold, and how much money you are willing to put into it. If you have any other questions, or if I didnt give you a correct answer, I'm sure other forum-goers and company owners will be able to help. Good luck with your search though