Now I'm on a similar route, I have bought throttle bodies from a Suzuki TL1000s (1000cc V-twin) for my 3.2 motor
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They are maybe a tad to big at 48 mm, but they where available and cheap, and that makes up quite a lot in my book (read wallet).
Being a big v-twin at 125hp, I think I can use the injectors and that makes it even cheaper.
When I figure out how to mount them I'll post some pictures.