ORIGINAL: MAUS45
Here is where you can get them and they are a very reliable source for parts and tracks as well. Sometimes they have stuff on Ebay as well. I have purchased Panzer III and Panther tracks from them and have had no problems with shipping from them to the U.S. They also have some bearing sets and other hop ups for the Tamiya kits as well.
http://www.mitosal.com/
Warning for Mitosal customers....
I Love the products... but HATE (not a word it throw about freely mind you) their policies on shipping costs at Mitosal. They are a total rip-off on shipping. I won an Ebay auction for 3:1 Impact gearboxes/TUs and the shipping for them was $55 (WOW). I then wanted to buy about 8 or so more items from the Mitosal website. The total was about $650 of which they wanted $160+ for shipping alone. They wanted $7 shipping for EACH pair of pinion gears. You know....the ones the size of the end of your pinky finger. When I questioned them on the individual shipping prices and lack of combined shipping the told me "that was how we make our money". Gee, I thought they sold tank parts for a business??? I then cancelled the order for $350 in additional parts I wanted and then they banned me from buying from them on Ebay. I do like their products, but I don't like how they treat people and run the business. Charge a realistic price for your item and true shipping costs. It just is not right otherwise!