add a detachable step to steps

all I can find is 'Redi-Step'.

it is a metal step with arms attached that fit over your last step to make another...detachable, use when needed.

I am wondering if anyone has another 'portable detachable' extra step when needed for that 'big drop' that sometimes happens on the last step when you level out.

only one I can find is Redi-Step and I am so close to buying and having in the toyhauler for 'when needed' and am just wondering if there is any other options before I hit the submit button and buy this thing.

thanks for any info on another detachable step brand if anyone knows one.

and no, we don't want a stool or 'whatever'....we want the true step you just attach on the last step. Redi-Step is all I can find and while it seems perfect, I was just wondering if there were other options before buying. like maybe one out there that matches my black steps :) instead of the light alum. colored Redi Step.

again thanks!