I have kits for these below.

I also have kits for these on eBay

SN1 Seal and O-ring rebuild kits

SN1 O-ring Kit + LB5004
SN1 O-ring Kit + LB5004
SN1 O-ring Kit
Seal LB5004
Price includes shipping
Available Qty: 3
LB5004
LB5004
Aftermarket Seal Part LB5004
Price includes shipping
Available Qty: 2
Senco SN1 Feeder Spring Kit
Senco SN1 Feeder Spring Kit
Senco SN1 Finish Nailer
Feeder Spring Kit
Includes parts
  • Feeder Spring KB5191
  • End Piece GB0146
  • End Piece GB0147
  • 2 Pins Pre '84 and Post '84
  • Instructions
Available Qty: 3