The only OMC Cobra parts that will fit, are from the joint venture years, that is 1994-1998; in those years they were the same as the Volvo SX . The earlier Cobras are very similar but there are small differences, you might not notice unless you compared them side to side.
https://www.ebay.com/sch/i.html?_from=R ... g&_sacat=0I found few but they are not cheap. They are out there though. What I see are ebay sellers who part out rotted boats and put stuff like this up on ebay. Just be careful but I got a complete transom assembly for my OMC Cobra including the trim rams and a complete outdrive with the correct ratio for the 4.3. For less than $1500 for both. Cobra parts are cheaper by far, but what you need is out there. Just have to look and be careful.