@bird902
Even if the width and diameter are the same there’s no guarantee that the inner gearing will be right, or even the proper drive teeth inside. Those cheap things off of eBay are total shite, even if they fit…
IMO Original parts are the only way to go with parts like these…
Is yours mendable? The teeth ring inside often gets bent and just needs straightening. That or used parts…
If the Dtx is the same as a Dtr part you’re looking at about £40 second hand…