Superchips have just re released their remap for the 170 pd DPF engine, albeit not with Bluefin, and slightly down on power from the first attempt that they pulled due to problems.
Also
this company have a similar bhp increase remap available.
Having said that, I'm no fan of Superchips, and the other link is to a company I know very little about, except that I know one person who has used them before without issues on an Audi A4 pd 130. Either way, I'd part with money to one of those before risking a tuning box. If things get a bit heated, you'd get zip all comeback from the tuning box manufacturer but you just might get some assistance from the tuners.