Your join date is just before I joined - you've owned the car a LONG time! (Im on my 3rd Roadster over 12 years.)

This is clearly a pump problem. The preferred fix is to grab a pump from a wrecked or 'parts' car.
The pump for coupes and roadsters is the same, before you even ask, including SRT6s. There is no programming needed, as all the car-specific brains for this are in the SKREEM.

The labor involved is not hard at all. The challenge is finding a suitable donor car.
If finding a pump is a problem, I can put the word out for you on our Facebook pages and link sellers to this thread.