I just went to Demon Tweeks. IIRC the Stack always uses your original fuel sensor? Had mine so it does fuel pressure too, but not Boost. Only went to Tweeks so I knew I would get the right one with spec I wanted, as yuo can have different colours, speed, rev counter, options etc...

Was about a grand, I can't remember exact amount

Took about 3 weeks to come. Not that easy to fit, was a lot of messing about, plus you need to put lights in your dash to replace indicators, headlights, engine management light etc....

Quality bit of kit though. You deffo get what you pay for! The sensors are top quality, infact it all is