I don't think any of our regulars on here have tackled a Trumpeter 1:200 R/C kit conversion. You don't say which one you are interested in.
There seem to be lots of build logs on the internet if you do a search.
Deans Marine and SHG Model Supplies can provide the appropriate running gear (motors, shafts and propellers) if you contact them.
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Hope this helps,
Colin