1999ish stern seat backrest

I'm looking for a stern back rest from a 1999 Ski Nautique.    The back rest I am looking for doesn't have the seat support at the bottom. I'm not sure what years they changed the back seat to remove the seat support. I know in my 99 the stern back rest does not have a support ledge at the bottom. The seat bottom has it's own self contained support. On his 97 the seat support was built into the back rest and has this extra ledge that we catch our feet on when we remove the seat. We've left the seat in but today unfortunately my fat ars stepped on the seat and one of the seats collapsed.. We will replace the wood at some point in the future. We really prefer the seat out but the support is a trip hazard and getting a backrest out of another boat that does not have that would be ideal. Any other idea's are also appreciated.