From THORLABS GVS002 Manuals
3.3.1 Choosing A Power Supply Thorlabs recommends using the GPS011 linear power supply to power the galvocontroller board(s) as this power supply has been specifically designed for thispurpose. The GPS011 can power up to two driver cards under any drive conditions and is supplied with all the cables required to connect to the driver cards. However, customers also have the option of using a third-party power supply or incorporate the boards into their existing system. In this case care must be taken to ensure that the power supply voltage and current ratings are within the limits specified.The drive electronics require a split rail DC supply in the range ±15V to ±18V. The cards do not require an accurately regulated supply as the boards themselves have their own regulators. The maximum current drawn by the driver cards will not exceed 1.2 A rms on each rail. In addition to this, for optimum performance the supply should be able to provide peak currents of up to 5A on either rail.
From GPS011 Galvo Scanner System Linear Power Supply
These power supplies appear to not be too constrained as long as you can do 15V @ 3A and -15V @ 3A.
You have found two power supplies: 5V @ 7A; 15V @ 3A; and -15V @ 0.5A and 5V @ 10A; 15V @ 3A; and -15V @ 0.8A. You do not need 5V.
You need to find a power supply that meets your needs or build it and not a generic power supply.
I'd confirm the info because your link is broken.