Replace the stock 18" tire/rim with a 21" tire/rim?

I've been wanting to replace the stock 18" tire and rim, with a 21" tire and rim on my 2006 TW. But every time I go to a dealer and ask if they know which rim and tire would be the best choice, I get the same answer. All they can do is tell me what parts I need to replace my OEM parts with.   

 I can't believe I'm the only person to want to do this Mod to this bike. I think this bike should have come with a 21" front tire and rim.  I know the bike will corner better, and the front tire won't want to wash out as much when I'm on dirt or gravel. Plus the larger front tire shifts more of the weight to the rear tire, and improves the way the bike handles.

Has anyone else done this to their TW, and if so which tire and rim did they use?

I asked this question to Buchanan spoke and rim, but haven't heard from them yet...       

Have a look at the Yamaha xt225 front wheel, it might be made to work.

Here is some info from the other tw site. one member replaced his front end with 21; wheel.

 I'm using the XT225 hub, 21 inch wheel, and XT225 triples. Pretty much an entire XT swap. If you use XT (225 or 200) triples the TW hub will not fit. It's too wide. I kept the TW front end for quite a while, but I was bottoming the front end out, so started looking at forks with more travel.