Wow, Ken, why can't they make one for the 450x to look like that? I would buy it in a heartbeat... The one they make now looks like the bottom of a shopping cart... Fugly!
I'll ask them. I don't see any reason they couldn't do this. Most of the 450X buyers are looking for maximum strength and size so they have catered to their needs. However, doesn't hurt to recommend they make one up like this.
If not, with your skills you could likely fit this version on your X.