Shower trap replacement - recommendations?

I have a downstairs shower where the trap has a crack in it and it lets out the water trap resulting in the drain smells being there

The floor the shower base is on is tiled and under this is concrete.

I am looking for somebody to replace the trap, however there appear to be two options here

(1) Take off shower screens and base, then  lift base out to facilitate a repair

(2) lift a closeby tile and "tunnel" towards the trap to replace.

(3) Any other ideas?

Any recommendations for somebody that could do this and recommended?

Thanks