Your search for "SFP-1G" revealed the following:
NEW Cisco DWDM-SFP-3033 1GB BASE-DWDM 1530.33 nm SMF LC SFP Transceiver
SKU: NSN-9105
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco A9K-48X10GE-1G-SE 48x 10GB SFP+ (Service Edge) Router Line Card
SKU: NSN-6644
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW HPE Aruba R8N87A CX 6000 Series 24x 1GB PoE RJ45 4x 1GB SFP Switch
SKU: NSN-9915
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco CWDM-SFP-1470 1GB BASE-CWDM Fibre Channel 1470nm SFP Transceiver
SKU: NSN-8014
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco ASR1001-4X1GE ASR 1000 Series 4x 1GB SFP 4X1GE IDC Router
SKU: NSN-2233
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco DWDM-SFP-4214 1GB BASE-DWDM 1542.14nm SMF LC SFP Transceiver
SKU: NSN-9108
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco IE-5000-12S12P-10G 12x 1GB RJ45 12x 1GB SFP 4x 10GB SFP+ Switch
SKU: NSN-2334
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Cisco A9K-24X10GE-1G-SE ASR 9000 24x 10GB SFP+ Router Line Card
SKU: NSH-6887
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco CBS350-24S-4G-NA 24x 1GB SFP 2x 1GB Combo 2x 1GB SFP Switch
SKU: NSN-0436
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Cisco Meraki MS355-24X-HW 16x 1GB 8x mGig UPoE 4x SFP+ 2x QSFP+ Unclaimed
SKU: NSN-3597
Condition: New
Shipping: Overnight Options
Warranty: 365 days