Umarex Umarex Origin Degassing Screw Size

Hey there, fellow airgunners! I have an Umarex Origin and was doing some work on it because the EPT appeared to be acting up a bit. I degassed it to try to release a little of the tube pressure and get it to move a little more. Anyway I have started to strip the degassing screw (luckily I was able to get it fully screwed in) and wanted to know if anyone knew of a replacement part site outside of contacting Umarex. I hear that their customer service is horrendous!

Thanks!