Congrats!
Where was that one made? Indonesia? Is it an Affinity? It should say on the headstock. If so it has a slightly thinner body and it should be Alder which is a great tone wood.
Trem bars are particular to the threads in that trem block. You'll have t look for the right one. If you plan on using the trem heavily you can take the block to a machinist with your new duty heavy trem arm and have them re-thread the block. Some guys are replacing the block with Callahan trem blocks and I'm sure you can get an arm from them too.