Usually they are very responsive but with this whole virus fiasco, I'm sure they are not operating up to par. You might try Seyco.com and see if the tips are interchangeable with the Hegner tips. If so, you can buy the tips and o-rings from them. Ray is a very nice person to deal with also. I'm pretty sure the tips interchange between the Dewalt, Seyco, Pegas, Excalibur but not sure about Hegner. Good luck. Maybe someone here can give you more info.