Jason,
Email Masa or Hirotaka at
[email protected] and they will help you out.
BTW I got all the stainless screws for my car from
fastener-express.com in the US. They don't sell specific screw kits but their prices are very good - I just buy large lots of miscellaneous sizes for use on my race cars as well as my vintage cars.
Check out the price of the Ultima at RC Champ too - it's a very good