Allen Sharar
TVWBB Super Fan
The old flatop grates were 24.5 or something like that. The weber part numbers werer 66910 & 66911 - charcoal grate and grilling grate, but have been discontinued for some time. Grillmark made one that you might be able to find - it's been discontinued for awhile, but sometimes will popup. The modern 26" grate will fit, but it won't sit on the grate tabs - basically just wedging it into the bowl. Killa Grilla made one, but are no longer making any grates. A custom shop like the one linked is an option. I'm interested in options as well - I have two flat-top 26'rs - a black (fleetwood) and red (aristocrat) - current grates are in pretty good shape, but I'd like a stainless option and regret not picking up the Killa Grilla when it was available.