I just found this on Avidartisan's FB page.
Shenzhen Avidartisan Technology Co., Ltd Sorry delay to reply u later because Our Festival. Like u said, the brass guide will be break if use about 1-2 months if use frequently. U can try to contact grayhaze in Europe, or lightningvapes in USA for the brass part. Thanks.
Ok, I just went to the LV site and they don't have them. I sent an email inquiring about it. I'll let you know if they respond.
I just sent an email to Grayhaze as well.