Listen to this advice. I went down the path of trying to find someone to swap the cores on a stock intercooler and no one was interested in doing it. Even had my shop ship an intercooler to several companies and it was a no go. I purchased a used intercooler as it was the only option and it is leaking. I just need to place an order with Rudy.

It will cost you more time and money and effort to swap the intercooler twice than it will to do it right the first time. If you don't have the money now continue to run the leaking intercooler while you save. Or come up with plan B for the money, e.g. an interest free credit card for 18 months.