ebay.. There is a ton of stuff. Just make sure that you read the description very good. Sometimes they will list it as what you have, then in the fine print it will say does not fit. Just check your numbers before you buy anything.
ya ebay is the easiest but people will lie about brands and all that and you end up wasting money, its good for small upgrades, but for big money upgrades go to an actual site theres a bunch jus google it or better yet ask a bout a product on here first . these guys know what there talking about
That's true on the fake stuff.. I do know a lot of integy stuff is faked. I know a lot of people don't like them to begin with. But that sure hasn't helped their reputation. For good advice on specific parts be specific on what it is you're looking for. There are enough people on here that have dabbled in this and that to point you in the right direction.
I've been very happy buying from Tower Hobbies. They have an extensive selection, good prices and good shipping. You can search parts by rig manufacturer, parts manufacturer, or parts description.
Tower, Horizon Hobbies, New Era Models, RC Planet. Just Google the part you are looking for and it will usually give you the most relevant site and go from there. So many choices, so little time...and play money!