The best place to get these pods are coffee artisan. They sell gourmet pods in every roast available. They are a little pricey, I think between 8 and 12 bucks a box, but if you order $75 you get free shipping...though I guess if you don't have a pod maker at home you don't need $75 worth of coffee (for a reference point, me and dh drink between 2 to 5 cups a day between the 2 of us and $75 lasts us about 3 months).
I love our pod maker, it's a Bunn. In a pinch we also just rig our own pod. You just cut a regular filter around the sides, press it into a half cup measuring cup and put in about 2 tbs of your own coffee. Then fold over the extra filter and press it firmly with the bottom of a vitamin bottle or cup. You can then put this in the coffee maker and moisten it with a little water to keep it closed and it works pretty good.