Your search for "fpr2k-nm-8x1g" revealed the following:
Cisco FPR2K-NM-8X1G-F FirePower 2100 8x 1GB Copper (FTW) Firewall Module
SKU: NSH-9918
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Cisco FPR2K-NM-8X1G FirePower 2100 Series 8x 1GB SFP Firewall Module
SKU: NSH-9917
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco FPR2K-NM-8X1G FirePower 2100 Series 8x Gigabit SFP Firewall Module
SKU: NSN-4788
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco FPR2K-NM-8X1G-F FirePower 2100 8x 1GB Copper (FTW) Firewall Module
SKU: NSN-5578
Condition: New
Shipping: Overnight Options
Warranty: 365 days