Yes, linear motors ML3 can be controlled by ctrlX DRIVE. Be aware that the encoder (linear scale or similar) matches the possibilities given at the "EC" encoder interface. A good choice would be to use Bosch Rexroth absolute integrated measuring system IMS-A with combined 1Vpp + Hiperface signals, where the linear scale is right built into the carriage guides.
Ready-made cables are not possible to order, yet. But simply use the ready-made cables for IndraDrive Cs and just exchange the connectors on the drive side.
Ready-made cables RLC2 and extension cables are available for connecting ML3 and ctrlX DRIVE. Necessary cross-sections might depend on mounting situation, see manual for details on this.
Contact your Rexroth sales partner for a cable quotation.