Hellobee Boards

I used Catprint for a lot of my wedding paper goods, and I also used it to print shower invites for my SIL's wedding that I had designed on Etsy. I've had nothing but good service from them, and they aren't that expensive!

You might have some issues if your file is 2-up. Most of the easy to use online services are set up to just take the area that is supposed to print. What is the final size of your invite supposed to be? A4 is something like 8.7x11.3 so a little bigger than standard letter. Could you contact the Etsy seller to ask for another file that is just the printable part? I usually ask my customers how they plan to print the file and then send them the individual file as well as multiples formatted on a letter size paper. Another option would be to work with a local print shop that would have experience printing things like this and cutting them. They tend to be more flexible than the online services. What kind of turnaround do out need?