As indicated by Phil, TRS Madras or Rajah Madras are the business. Used by many TAs and restaurants. At my local they are made as follows:
Heat fresh veg oil in a large frying pan or karahi. Test that the oil is hot enough by dropping a small piece of an uncooked poppadom into the pan; it will rise to the surface quickly when the oil is hot enough.
Remove the plastic wrapper from your poppadoms. Don't separate them. Put the whole lot as they are on your work surface close to the the pan. Using two stainless steel slotted fish slices (one in each hand) pick up 3 poppadoms at a time (sandwich them between the fish slices). The cooking itself happens very quickly. Immerse them in the hot oil and then use the fish slices to rotate the poppadoms, basically 360 degrees. Simultaneously, push the popaddoms down into the oil (they will try to curl up on you). Then sandwich them again and turn them over. Give them a quick spin as before and remove to, e.g, a large dinner plate. Cooking the 3 poppadoms should take no more than about 10 seconds. A little tip is to use the fish slices to press down the sides of the just-cooked poppadoms. This will flatten them down (just like what you get from the TA). You can press them down quite forcefully. They won't crack/split, as it takes a few seconds for them to "crisp up" after they come out of the hot oil.
Carry on until you've cooked as many as you need. Obviously take care when pressing them down you don't smash up the previous (crispy) lot lower in the pile. When all done, pick them all up (this time using your hands to sandwich them) and turn the pile vertically (on their edges), to let excess oil drain off. Job done. Restaurant quality pops. The TA stores the freshly cooked poppadoms in the bottom of an upright type oven, to keep them warm. This oven also has several solid shelves. These shelves are used to keep your curries etc. warm (in their plastic containers) until your complete order is ready to be bagged.
Hope this makes sense.
Rob

For spicy poppadoms I've found Swad the best. They taste great and seem to be just the right thickness to be oven cooked at 210 degrees C in my oven, without burning. Apparently the TA cook these in the tandoor, but I've not seen this done, because no one has ever bought any.