I don't believe they do mail orders... but I imagine they can work something out as a courtesy. And, yes, if time is of the essence, you better go elsewhere jersey turnaround procedures are an afterthought with them... But the end product is the exact same as what the Flyers wear on the ice... I only use them -- drop off/pickup -- and forget about the time factor, as they never notify me when it is sitting there to pick up... I check on them once in a while to find out. haha
I ordered 1 jersey via mail from the Skatezone a few years ago - a Jagr one when he was on the team. They did a crappy job sewing the numbers on the back. They apparently didn't have the numbers flat when they sewed it - it looks kinda crappy.
I have it signed by Jagr and mounted in a shadow box. I had to use several straight pins to pull the jersey different ways to make the numbers look better. I wouldn't buy from them again, personally.