In the US and especially Florida and Carib most rental tanks are yoke. Certainly a DIN can be found and as often the DIN insert is locked in due to the valve having been hit/bent or corroded. Frankly, DIN is a PITA unless really needed for certain types of diving. Otherwise just get a yoke. And then, especially with Scubapro, get the DIN kit for the Mark 25/19/17, same part number and you can use a PITA DIN if you insist or a nice and good yoke!
Easy to switch and both bases are covered. Buy the yoke, get the DIN kit above.
James