ebay....
Nick, that link that timmyboy sent you has a set of carbs that should work for your GTX. These are the carbs attached to the rotary plate that also houses the oil injection pump. Correct?...
If so, these will work. Look down the page. The give away to the right ones show the rotary plate still attached.
He states they were on a 587. You'll need to rejet them. If you get them, you can PM me and I'll tell you the jet sizes your suppose to be using.:cheers: