Hi Mark,
Just look up the standard GXP bottom bracket, best price I found was on ebay with super quick shipping. I can't post links... sorry. Park tool BBT-19.2 will remove the hollowtech and install the GXP. I used a bit of electrical tape to prevent marring both BB's. Don't recall torque specs off the top of my head. I greased everything prior to install, do not use the provided spacers with the GXP BB, as they are for MTB BB spacing.
As far as the exact model number for the cranks, I don't have one. From all my research the chainline is the same as stock. It took several weeks of trying to score a deal on Ebay for a GXP set. I managed to steal a new take off set with 40T chainring (No OEM packing) for $150. I got 175mm as my previous bike had, vs the stock 172.5. If you want just look into getting new crank arms, as I have confirmed the stock 42T ring bolts right up.
Best of luck!