There is a good possibility there will be some type of number on the existing motor. Take that number and Google will be your friend.
The motor for our front steps went out a few years ago. A quick search found it easily.
And the funny part...
If I bought it as a step cover motor it was $150.
If I bought it as it started life, as a power window motor, it was $15.00.
Shop around, you should be good.
There are 24 hours in every day - it all depends on how you choose to use them.
Bruce & Jill Brown
2008 Kountry Star Pusher 3910