Give them a call
I too need a prop strut, and was saving his page
http://www.dahmermarine.com/Struts.htm as reference. With the update from Steve above, I tried calling them ( 11 pm est ). Of course no one was there, but the phone was answered by an answering machine, so they may still be in business. I will call tomorrow to verify, otherwise, I am in deep yogurt as mine is broken. Mine looks like the sailboat Y strut. I will update tomorrow.