This is the tremolo back plate you will need for a perfect replica of Mark's metalic red Alchemy Strat.
On a vintage Schecter Dream Machine the tremolo back plate was of metal, in this case white-enamel aluminium, just like the white pickguard.
Theoretically each piece of metal within the pickup's magnetic field will have an effect on the sound of the pickup. In case of the tremolo plate (in contrast to the pickguard!) this effect might be neglectable. For originality, and the 'vibe' of your replica guitar, it might be not!
Traditional Fender / Schecter ('vintage') dimensions.
Left-handed version available at same price, ask for availability.