I just did this today. I couldn't get the hoses off at all. I was running out of patience, so I took the new filter to Autozone and grabbed some new fuel line. I think I got it a tad bit small. I got 1/4" tubing, because it fit nice and snug in the story. However, it doesn't slide all the way down the shaft, so I just pushed them on as far as they could go and clamped them. The tube won't come of, and doesn't leak. I guess my only concern is that the internal diameter is about the same as the hard lines. The original tubing looks slightly wider.
Anyway, I just took some snips and cut all three hoses. I used a golf tee to plug the blue line that leaks gas and then I used a box cutter to cut the hose off the hard lines. It only slid off the front one. The back ones were on there good. Only cutting worked. Be careful though. I think the hard lines are plastic.
I'm wondering if I should grab some thicker fuel line and reconnect the filter. Is that just being anal? PEACE.