Transom boarding ladder

I am trying to find an appropriate looking transom ladder for my '65 sn.
Does anyone have any information of a vendor for a permanently attached 4 step folding transom ladder which would attach on the top of transom with stand offs attached to the vertical portion of the transom? I found the one I wanted on a Garelick website but in calling, the ladder had been discontinued. Detmar also had one but it is a 3 step. It is going to have to have a low profile hand hold on the transom top to avoid the ski rope.