for the comic cons you can actually do a google search and find most of the ones you are looking for. i know that some will forward requests onto the celebrities and some won't. also it depends on who you are looking to get at the cons. like coming up for the one in Rhode island later this year they do have a service that does through the mail autograph requests, and what they charge. they also do Star Wars Weekends. it is how i am looking to probably get Ashley Eckstein and James Arnold Taylor to add to my Star Wars Collection. as far as TS i am not sure on that one, but good luck. :)