Injector Upgrade

Hi folks,

I have a VW Jetta 2.0 TDI which was 140HP standard, now sitting at 225HP.

Mods:
- Hybrid Turbocharger
- K&N Panel Filter
- 200CPI Sport Cat
- 2.75" Stainless Steel System (Full)
- Custom Re-Map and Dyno Tested
- Mintex Drilled & Grooved Brake discs w/ Mintex Brake Pads
So far I'm sitting at 225HP with the hybrid turbocharger running at 1.7 bar (24.65 psi)of boost, the turbo is rated to 2.2 bar (31.9 psi) - this should be more than adequate to get me to ~270+ HP however, my current injectors have me limited - specifically the nozzles.
I have been searching online for somewhere to get the nozzles/injectors I need but the best place I could find was Darkside Developments which have the upgrade I need for £700.
Has anyone bought injectors from darkside developments before? or is there anyone who can recommend a dealer who can supply the higher flow nozzles I need?
The engine code is BKD - it's a 2.0 16v TDI engine utilising PD injection. (NOT COMMON RAIL)

Any help is much appreciated

Cheers