Hi Mark On my 225 i fitted a DW65c fuel pump, only needed a slight modification a lot cheaper than Renault and will be okay if you go for an uprated fuel system in the future
Refer to this thread: http://rsmegane.com/threads/best-place-to-get-a-new-fuel-pump.18009/#post-189735 Has some DIY el'cheapo trickery inside which works. Pond man and myself both swapped our pumps only inside the sender unit. We fitted direct OEM Bosch pumps. Fraction of the price of the whole unit and you get to buy yourself some nice tools too
I was running a 250 meg engine in mine, so also had a 5 bar regulator in the housing to give me 3.5bar rising rate at the fuel rail