Call and ask for tech service he will be of better help than the CS reps.
Hopefully he can get you sorted out.
PM Justin [JB-Umarex] and see if he can help. He's in marketing, but monitors the forums to help where he can. When I needed a couple o-rings for my leaking Air Javelin Pro, Justin spoke to the techs to get me the correct sizes of the o-rings needed and even sent me two. This was after I contacted CS and was told they don't sell 0-rings and I shouldn't fill the Air Javelin Pro to more than 3000 psi, even though it's advertised to take a 4500 psi max fill! He'll get you an answer that's not B.S.