First off, welcome to TU, the 8th Wonder of the World. By using the "Search" function, you can find a wealth of info to answer just about any question you have concerning airbrushing.
As for the Rats, e-bay has several "lots" for sale.
Here's one
http://www.ebay.com/itm/45pc-Lot-Original-Rat-L-Trap-Lure-Bodies-1985-1994-Rattle-Trap-Floater-/350515518167?pt=LH_DefaultDomain_0&hash=item519c5a5ad7
Good luck.