I'm pretty tall, and my knees are right up against the steering handles on my 2006 Yamaha Vino 50cc. I would like to raise the handle bars a couple inches, and also get a seat that allows me to sit back further towards the rear of the bike. Can I buy any aftermarket parts that are made for the Vino, which already do this? Or would these both have to be custom changes? I've looked a little bit on the internet, and can only find the standard parts for the Vino.