SmokinJoe

Thanks for the comments. Here is what i found as I followed up the leads:

Graves do not stock the TT46 parts, but replied to me straight away and were helpful.

Tower Hobbies got back to me the next day and showed me where the TT46 parts were. They are listed in the marine (rather than air) engine section which is why I couldn't find them when I first looked. They have all the parts and the prices are similar to what I was paying from TT4U.com last year.