I believe the hoses and tools haven't changed since, except for color, since the G3. You might luck up and find a set at a thrift shop as I did for a set of Gsix tools one time for a little less than $5, or check eBay. You never know what might turn up. I found the set below in about 10 seconds:
[URL unfurl="true"]https://www.ebay.com/itm/Kirby-G-Series-Vacuum-Cleaner-Tool-Caddy-15-piece-Tools-Accessories-Zip-Brush/154160195535?hash=item23e4a9e7cf:g:OuAAAOSw22Ffla2A[/URL]