@Kevin in Ohio...here's a pic of the replacement spout kit. Made by EZ-POUR. This one is the HI-FLO Replacement Spout and Vent Kit. The yellow threaded cap pictured on the 5-gal kerosene can fits Midwest, Blitz, and Wedco cans. The black threaded cap to the left of the can is used with the 8" flexible spout for Rubbermaid, Gott and Essence, and Briggs cans. Beside the black threaded cap is an 8" flex extension that threads onto the existing flex, then the yellow end cap can be tethered to it if you need the extension. Both the 8" flex and the extension have 7/8" pour openings. I think I paid $6 or so apiece for them a couple of winters ago IIRC. One thing I did do when I installed the vent on the rear top, I moved the piloted/reamed hole 1" to the right of the jug seam for a better flush contact fit. I reamed the hole to .490 if I'm not mistaken and popped it in/sealed it at the very bottom with a light bead of sealant...probably didn't need the bead of sealant to be honest with you, since I slightly undersized the hole.
Hope this helps ya. If you can use these but can't find them, shoot me a PM, I'll pick them up locally and can send them to ya.