The 'APR' Walbro 255 pump is only around 85 quid. So I guess the cost is in the controller and fittings.
I rigged up a Bosch 044 pump in a big turbo Xbow around 5 years back in the factory basket, but got rid of the oem fuel pump controller for a simpler relay system. Never had any issues with that setup even on slicks.
I'm not sure how the APR system will be for the fuel return, and if it will still overheat the stock controller over long high speed runs.