To tell you the truth, its hard finding such items here. And if you see Eng muffins, they only sell one brand and its usually frozen. You might want to consider looking up a recipe online and getting the ingredients and making your own (and freezing the extra), as much of a hassle as that sounds. I've seen pita but it's always white.
You typically won't find the selection you'll find in your home country. For instance, in the US where I'm from, go to a store and there will be the following types of Eng muffins: white, wheat, honey wheat, multigrain, cinnamon with raisins, double fiber, rye and a host of others in several different brands. Here, you want Eng muffins and you generally just get white.
I've found that items at grocery stores here are hit or miss. Sometimes they'll carry specific products and you go back a few weeks later and they're no where to be found. With that being said, there may be some speciality grocers that sell what you're looking for, such as a neighborhood bakery (maybe one will take special orders, but maybe not). I don't know because I usually just go to Giant, Cold Storage, Fair Price or the
condo convenience store.