I had this problem with him back in 2014.
At some point I was finally able to make contact and the part I paid for was delivered and money refunded for the inconvenience.
I do know that he recently revamped his website so he might be occupied with that (not saying that it is ok for his customer service to be sub par).
I need to buy a simple ignition panel from him and noticed that it isn't listed on his new website.