H2, you mean is the mosfet easily replaceable? i think so, but not too sure of your locality for electronic parts.... anyway for the MPX4250 Map sensor, you need to bend the legs too, check your casing that comes together, try do a trial fitting onto your casing before soldering the MAP sensor, coz u gotta bend it in a way that the map sensor hole facing directly to the hole ready made at the casing area, end of the day u need to connect the vacuum hose directly thru that hole.
i suggest you just desolder the mosfet and resolder it again, this time bend the legs first make sure it fits and the body of the mosfet sits perfectly flat towards the heatsink (remember heatsink paste), dun worry the legs are long enuff, this is better than if u make a 90 degree extra aluminium to connect to ur mosfet coz i'm not too sure whether the mosfet is touching the casing, that's y u should also do trial fitting with your casing....