I have always been able to buy them across the counter from an injector pump repair shop.
Google Stanadyne pump repair kit or Roosamaster pump repair kit. The maker is Stanadyne but the pumps were once called Roosamaster pumps.
Don't tell my cattle I got leather seats!
2006 F450 CC Hauler bed 4x2 6.0 L Pstroke/Torqshift, Lariat, 4.30 r/a, SCT, 4in exhaust. 94 K
2006 F350 Lariat CC Dually 4X2, 6.0 TorqShift 4.10 LS, SCT, airbags, 4 in. exhaust. 147K
36 feet on the floor Elite/Outlaw LQ horse trailer.
36 foot double tandem axle flatbed trailer.
36 foot Sooner 6 horse large dressing/ mid tack.
2003 EB Expedition 141K
2004 Volvo V70R AWD-high miler in fleet, 205K