Your search for "SM-X" revealed the following:

NEW Cisco SM-X-4X1G-1X10G ISR 4000 Series 4x 1GB Combo Router Module

SKU: NSN-2130
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco SM-X-ES3D-48-P ISR 4000 48x 1GB PoE+ RJ45 2x 1GB SFP Router Line Card

SKU: NSN-4039
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco SM-X-ES3-24-P 24x 1GB PoE+ RJ-45 Router Line Card

SKU: NSN-3246
Condition: New
Shipping: Overnight Options
Warranty: 365 days

Cisco SM-X-6X1G ISR 4000 Series 6x 1GB Combo Router Module

SKU: NSH-8036
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

Cisco SM-X-6X1G ISR 4000 Series 6x 1GB Combo Router Module

SKU: NSH-5387
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco SM-X-6X1G ISR 4000 Series 6x 1GB Combo Router Module

SKU: NSN-3334
Condition: New
Shipping: Overnight Options
Warranty: 365 days

NEW Cisco ISR4451-X/K9 4x 1GB RJ45 4x SFP 6x Slot (3x NIM 2x SM 1x ISC) Router

SKU: NSN-8280
Condition: New
Shipping: Overnight Options
Warranty: 365 days