Can't speak..
to the e-mail response, but I ordered mine on the internet also. I phoned them yesterday, and they are hanging on to the internet orders and will fill them when the next batch is in. The person I spoke with seemed to have a copy of my order at hand, but also was fairly busy taking calls.
I haven't done much business with them in the past, but it seems to me that Earls is a specialty shop (Walthers), and is the place to go for that TM. The one thing about shops like this, in my estimation, is that they can get the new stuff first, but on the high demand items, you have to wait your turn. I think the P22 has turned out to be a pretty hot number, based on the price, name, etc., and I don't think Walther or Earl was quite ready for the volume of sales and the interest in the barrel kits.
I'm just guessing, of course, and I know it's irritating to not get a response to an inquiry, whether e-mail or not. I'm also aware that making a phone call can cost some change, depending on time of day, etc. If a business has an e-mail address posted, they really should be attentive to what comes in, and respond to it as soon as possible.
In short, I'm like you. I considered the e-mail option, but passed in favor of the phone because I like to talk to people in person when I have a question about an order. That's why I posted what I found out, just in case there were others out there wondering what was up. Disregarding what you think of Earls, I hope it helped.