There was a gentleman on this board who was making them. Give me a minute and I'll dig it up for you.
http://chihuahua-people.com/viewtopic.php?t=6057
Check out that link, he made custom stairs in the past, not sure if its exactly what you're looking for, but hope it helps.
http://chihuahua-people.com/viewtopic.php?t=6057
Check out that link, he made custom stairs in the past, not sure if its exactly what you're looking for, but hope it helps.