On the topic of the A10, i'm thinking about keeping it in my B10. The A15 I bought is still sitting aside. I'm going to do the A10 up a bit, the short stroke would be interesting. And then when I get my act together I'll put the A15 in. I think if I had a garage or shed it'd be easier, doing it in the carport sucks.
EDIT: Sidedraught has one that is said to have gone pretty hard.
Any engine reconditioner should be able to get one done for you. They'd probably order it and get the profile done. You could take your own in (engine reconditioner) and get it done I think too. Do a google search or yellowpages for victorian specialists, or hang on for a while and one of your lads should post something to help.
If it were down the road, I would have salvaged it only for the fact that it's a B10. But the delivery cost was at $350 to my door, (which is good mind you) and it still wouldn't have been worth it.