well to get them directly from Peter is really hard. every once in a while he will post a batch of tools for sale on his site and depending how popular they are they sell within the hour or even in a few minutes. so you just gotta stay updated with his blog to find out when he announces he will have a sale.

other than that you can go on ebay but they usually sell for double or more than double the price over there. another place you can check is the exchange on BF, i see them pop up for sale there from time to time at good prices. and another place would be edcforums.com. they have a sale/buy/trading forum there and theres probably a few for sale there right now. they are usually really good prices there too.