Shower tray replacement?

[ben100]

I'm looking to replace a shower tray that has cracked & is popping all over the place (guess previous owners had a bodge installation done). It is one of those low profile trays with the waste in the middle in a downstairs bathroom & is tiled around it. I'm looking at the Mira flight trays but they don't seem to do ones with the waste in the middle, how hard/costly would it be to move the waste over a little so I can go for a different tray/size?

 

[exedon2]

Almost certainly can be done but not enough information!
Type of floor ? Soild? Suspended? Floating? Just to name three.
As my crystal ball is a bit cloudy maybe get 3 quotes from decent local tradesmen?.

 

[ben100]

Almost certainly can be done but not enough information!
Type of floor ? Soild? Suspended? Floating? Just to name three.
As my crystal ball is a bit cloudy maybe get 3 quotes from decent local tradesmen?.

I believe the floor is concrete, it is a downstairs bathroom & tiled. Won't be looking to move the drain an excessive amount maybe just a little bit over along the same side for perhaps a smaller square shower instead of the rectangle one currently & not a low profile one like this as it doesn't drain water as fast as it should & pools.