We do have a few options for you to choose from to replace the single step on your 2017 Keystone Springdale 245RB.
Out of the available choices I recommend either going with the SolidStep Manual Fold-Down Steps # LC791572 which mount to your threshold or, if you want the same style step, the Hickory Springs Manual Pull-Out Steps # 95324EXTALC1 and using the Outriggers # LC301704 to relocate your mounting brackets.
You are correct that there are no steps with mounting brackets 26"... view full answer...