Do us a favor and take a picture of your drive and transom assembly.
A new transom assembly for an Alpha 1 Gen 2 drive is around $3k. $1k in labor to remove the engine, the assembly, and reinstall is not that far fetched.
If the transom assembly is salvageable you have some options. Your best bet would be to send your Gimbal Ring to JR Marine to have it repaired (I assume they can do Alpha drives)...otherwise you need a new Gimbal Ring @ ~$1k.
You will most likely need need to purchase a new steering pin, OEM is around $400.
...there are aftermarket options for close to $150...then the bushings and seals to replace the ones in the Gimbal housing.
Add everything up using OEM prices it makes sense to buy a new transom assembly...using aftermarket parts makes it a whole lot cheaper though.