Unfortunately, I don't think you'll find a complete with such a high standard height.
What you can do, however, is buy a complete regardless of what height the bars may be, then purchase some Affinity T-Bars. Affinity makes the cheapest and greatest T-Bars (debatable, of course) on the market now, in my opinion. They come in, I think, 26" tall by 24" or 25" wide, so they're plenty big! I recommend buying them in standard size and also buying a SCS compression system as this compression system adds about an inch to your height in the SCS clamp alone. Keep in mind that you'll have to find a scooter with forks compatible with SCS compression as well.
You'll still end up spending quite a bit, but if it's what you want, this is my best advice.