I would try putting GOOP on that part of the hose. You will loose the flexibility and expand-ability but only for the short distance of the leak. Also, I have used Gorilla Tape for that purpose with success for a short term solution. At Lowes or HD you will find a product to repair hoses that is a rubber type tape. You take a length of it and stretch it out, wrap the offending part of the hose. This stuff works best of all if you can find it. It essentially anneals and sticks to itself making an almost permanent repair.
By the way, I have purchased twenty feet of one inch hose at Lowes in the waterscape or pond departments. It costs about twenty bucks and I replaced a macerator hose on my Roadtrek and it was still working fine when I sold it four years later.
Paul
PSW
2013 Phoenix Cruiser 2350
2014 Jeep Cherokee behind it
and a 2007 Roadtrek 210P for touring