As usual Ebay is here to your rescue! A simple search there will turn up all sorts of unauthorized Torchwood goodies just ready for gift wrapping. My personal favorite are the Torchwood banknotes.
Source: Mark Appleton Banknotes
This finally explains where the Institute gets their funding, Pterodactyl chow and sauce doesn't come cheap you know. The crew simply drops by the Bank of Torchwood and can print up as much cash as they need. Plus if any alien investigations send them to the States, no problem, there are also Jack Bucks available.
So how does one pay for Torchwood money? With Torchwood Paypal of course.