Yes I do know how to do these
Foamboards you can get either in an artist shot or a DIY shop. You need a VERY sharp carpet cutter or similar. (There are professional knifes in artist shops that do the trick). Now the trick is to leave some white space around the image. Go outside- spray some of the mounting glue onto your print (you get that one in an aritst shop as well)- find a flat surfac and now it gets tricky...you need to put the print upside down and then place the foam on top of the backside of the print. You have to first mark the print on its backside so that you know where to fix the foam to. Make sure when you flatten the print/push it onto the mounting board that you wear proper photographic or similar gloves. Another trick is to buy some mounting board (much thinner than the foam you have in mind) - mount it onto the mounting board and then put some piece of equally sized wood/foam onto the back of the mounting board so that it stands out from the wall.
There must be tons of little videos out there on the web to show you how to mount a print on alternative surfaces and it is really helpful to see it done before you go and attempt it. Good luck - it does take patience!