The 6ED1052-2MD00-0BA6: Supply is quoted to order against an RFQ. Expect standard lead time for an active Siemens catalog item; expedite options depend on current factory loading.
Closest second-source: 6ED1052-1MD00-0BA6
The 6ED1052-1MD00-0BA6 is mechanically and electrically identical—same width (72 mm, 4 SU), same I/O, same relay ratings, same approvals. The only difference is the –1MD00 variant includes an integrated display; this –2MD00 omits it. If the panel was spec'd for the –1MD00 but you don't need the front-panel HMI, this part drops in without rewiring—same terminal assignment, same DIN-rail position.