Hump Hose 1-1/8" ID

[richard5933]

Noticed a couple of drips of coolant today on the line running from the engine to the bulkhead for the OTR heating system. I was able to give 1/2 turn on the clamps and stop the drip for now, but the rubber connectors are looking dried and cracked on the end so I want to replace them.

The tubing from the engine to the bulkhead is largely made of 1-1/8" OD copper lines, but they used two rubber connectors along the way to reduce vibration. The two connectors are the kind with the hump in the middle, which I believe is there to help reduce vibration and provide for more flexibility.

I've searched all the typical sources for the hump hoses (Gates, Eaton, etc) and have found them, but the problem is I cannot find the 1-1/8" ID size. I can find them in 1" but not sure if it will stretch enough to get over the copper tubing. I have also found 1-1/8" straight silicon tubing, but not sure if it's flexible enough to provide adequate vibration reduction. I'd hate to fix a leaking connector only to encourage a crack in the copper piping from vibration.

Any sources out there with a hump hose in 1-1/8" ID? Length appears to be a tad bit over 4", but I could cut down longer pieces if necessary.