Sirion MK1 Drivers Headlight

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Hi
Someone backed into my sirion 1.3 Auto MK1 and smashed my drivers side headlight, I have sourced a replacement but on viewing light discover that the front panel of the car seems to have to come off to gain access to the 4 bolts holding the headlamp assembly in place as the bolts screw in from the front of the headlight and are deep in the engine bay.
Help Please