New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
It should still work. The 98 EV was a P8 bike and the tank had the same fuel fitting as my '01 with the later computer. If I'm not mistaken the Jackal as well as the Bassa were all the later version.
As might be expected, Ebay prices are all over the map. From a surprisingly almost-reasonably 80 bucks to insane and moronic three-digit prices which are much more like what I expected.