That sounds like your best option, although I am of course not advocating any sort of illegal activity on your part ...
The only places in the UK that chip consoles are untrustworthy shops and scary men who operate their own market stalls. A few months ago, I visited a computer fair, and it was quite frightening to see the amount of pirated goods on sale there. Signs such as 'chip your console for just £20' with miniscule 'no refunds' stickers underneath those spring to mind immediately. :/