I'm gonna post this for other people that may run into this problem. Keep in mind this is only for the hose between the canister and the large purge valve. The hose between that purge valve and the smaller black one is the same size on both ends. If you need to get this hose replaced (this is at least my experience at Murray's), you won't be able to find a direct replacement easily, or I don't know if you can at all. You probably can, but to save hassle, what I did was I bought a 3/8" hose for the end that attaches to the canister, and a 1/4" hose for the end that attaches to the purge valve, and then bought a universal (one that accepts up to 3/8") and some 3/8" & 1/4" clamps. You can use the universal/clamps to adapt the two hoses together and then hook the proper ends up to the canister/purge valve. This is the only way I could get it to work because I couldn't just buy a 3/8" hose because it was too big to fit on the purge valve, and then the opposite (having just the 1/4" hose) couldnt stretch to fit over the canister connector.
Hope this helps someone!