if you are only gonna run the 10 psi you are already running then you will see no gain by fitting different injectors and chip.

the standard fuel pump if working correctly should be ok for about 200bhp or slightly more, but for around £100 you could have an uprated escort cossie pump from FSE, go for the one advertised as 350bhp capable, although in truth it is not capable of this at all on your fez, but will be fine at the power you'll be running.

then take the chip and injectors to a tuner and have them fit them and carry out a full management setup and on boost fuel check, probably cost between £120 and £150 plus a bit extra to fit chip and injectors.

the beiges are generally safe for around 16-18psi, which with the mods you mention will see you past the 200bhp mark