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 Seal LB5004 Price includes shippingAvailable Qty: 12LB5004Aftermarket Seal Part LB5004 Price includes shippingAvailable Qty: 6Senco SN1 Feeder Spring Kit YK0020Senco SN1 Finish Nailer Feeder Spring Kit Includes parts Feeder Spring KB5191End Piece GB0146End Piece GB01472 Pins Pre '84 and Post '84Instructions Post navigation Senco Stapler M1 M2 SC1 Rebuild Kit includes O-ring Kit + LB5005 + BB0147 Senco SN1 SNI Parts Seal LB5004