The AAP front blocks aren't really available any more, you could only find one used. I forgot how many were made, but it wasn't a lot. You might be able to find one on RMOG. Personally though i wasn't that impressed with it and i ended up modifying mine into something much better.
This is what i ended up with:
I drilled out the old mounting point and countersunk it to mount a mag VA there, then i took off the minicocker VA and screwed in the LP reg where that was. It worked nice, but you had to use the stock frame with it. It also put a lot of weight on that front piece of the stock grip frame and did not seem very strong to me.
My new front block was made by rainman229:
I like this one much better. Way more solid, makes the front look a little more cleaned up. and it has the frame adapter. Only disadvantage is that it makes disassembly and assembly more difficult
This front block and the back block are both still available from rainman229, but not at the moment, he has recently moved and needs a month or two to get back up and running.