Received my Seat Concepts upgrade kit for KLR250 this week (promptly).
Initially I was kind of wishing that I'd simply shipped them my seat pan and paid the extra $20 for installation. But as a long-term DIY-er, I took my time and got it installed without wrinkles. See photo.
Haven't done a ride on it yet but looks like a nice upgrade. New foam is a bit wider. And newer.