lower end question?

i have a 93 yamaha prov 150 hp. i stored it under my car port this winter only thing is is that with the trailer it sticks out past the carport by a good 4'.
anyways so we got dumped on last night with like 14" of snow. while at work the plow truck for my driveway came. anyway my dad was over cleaning walkways and stuff when he noticed the bottom fin on the lower unit broken off!!!!! is there any replacment for this with out replacing the entire lower unit???

[boats.net]

There are aftermarket replacement skeggs that can be welded on. Check with welding shops or outboard dealers to see if anyone in your area can re weld it.