AFAIK It will cost more than twice as much if they need to create a mould. Maybe ring around all of the fibreglass places you can find and see if anyone already has a mould?
1988 KE70 Wagon - Slowly rusting 1990 NA6 MX-5 - because reasons 2018 Ranger - Because workcar 1997 FD3S RX-7 Type R - all brap, all the time OMG so shiny!