Your search for "nim-" revealed the following:
NEW Cisco NIM-4BRI-NT/TE 4000 ISR Series 4x BRI Network Interface Router Module
SKU: NSN-0085
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco NIM-ES2-4 ISR 4000 Series 4x 1GB RJ45 Router Module
SKU: NSN-3004
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco NIM-4FXO ISR 4000 Series 4x FXO (Universal) Router Module
SKU: NSN-5854
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco NIM-4T ISR 4000 Series 4x Serial WAN Router Interface Card
SKU: NSH-6910
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco C8200L-1N-4T Catalyst 4x 1GB WAN 1x NIM Slot 1x PIM Slot Edge Platform
SKU: NSN-0039
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco FPR4112-NGFW-K9 FirePower 19 Gbps 8x 10GB SFP+ 2x NIM Slot (NGFW) Firewall
SKU: NSB-9952
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ISR4221/K9 1x 1GB RJ45 1x 1GB Combo 2x NIM Slot 1x ISC Slot Router
SKU: NSN-3167
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR1001-X 6x 1GB SFP 2x 10GB SFP+ 1x NIM Slot 1x SPA Slot Router
SKU: NSN-5195
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR1001X-20G-K9 6x 1GB SFP 2x 10GB SFP+ 1x NIM Slot 1x SPA Slot Router
SKU: NSN-1630
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco FPR4112-ASA-K9 FirePower 40 Gbps 8x 10GB SFP+ 2x NIM Slot Firewall
SKU: NSB-9960
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days