I want to replace the silencer on my '88 XR600R, but I can't seem to find one. I can find them for about every year but '88. I was thinking something a little more 'trick' than the stock silencer - something like a White Bros stainless, etc. Anyone now where I can get something like this? Do I just buy a regular silencer and get a pipe conversion (if it exists)? If so, where do I get that?