No I don't know much about seaducers but theres bound to be people on the board who do. Set up a post and ask for info - everyone will share. I wouldn't rush to buy a K&B 45 as there are better motors out there that are easier to get parts for.
Yeah but I would look for something like CMB, MAC, Rossi, OPS - they are all good motors and you can get parts. The Picco 45s you see on Ebay are good also but you can't get spares. Not a good idea.
Mecoa, is another name that K&B uses for their airplane engines and their .18 car motor.
What size mono are you looking for?? Specifically a .45 or a .21 perhaps??
What is your budget becuase there are some really affordable .21 monos on the market these days. And you can pick upa used .21 that's a really good motor to go with it.