Yup. If you provide the patch, I think they charge you $6.50 to sew it on. Just got my Lemieux back and had them out a '95 Stanley Cup patch on as well.
I just asked for it in the usual location on the front if the right shoulder and they knew exactly where to put it. For the All Star jersey, I enclosed a picture so they knew where to attach the team patch. That was at their suggestion when I asked if they knew where it went. The guy who answered my e-mail said he was sure they knew, but I could send a picture to be sure.
If I were you I'd probably find and send a picture with yours, just to make sure it was placed correctly. It's probably overkill though, they seem extremely knowledgeable and I probably told them something they already knew.
Awesome, thanks again Fitz! I will probably send a picture just to be sure, but yeah it sounds like they have it together lol. That's why I decided to give them a shot, looks like they do a great job.