I guess you are talking about the A- frame for lights & aerials? I'd be surpriosed if Yam didn't do that as part of their "optional extras" - unfortuantely the Yam website is having arguments with my firewall at the moment, so can't give you a link....
Most frames for a given size of boat should clear most engines that will fit on it! - And if it;s a whole Yam package the Yam one will definetly fit!
