Heater Vent Tubes

If I am seeing your hose correctly, yours is much like mine- the hose actually "tapers", it is 2" at one end and 2 1/4" at the other end. No one makes a replacement hose like this. All "replacement hoses" are 2" and some come with an adapter. Yes, most are attached with a clip that makes it almost impossible to remove without tearing the hose. This is why it is so hard to find good replacements. The example you are showing with the little plastic 'latch" was used on some models, but not as common.