Welcome!
Not sure what your price range is or how new you would like to look for. But the Jayco 32 BHDS has a sliding door. I don't recall for sure, but the older version I think had a door also, 31 BHDS I think it was. Built back about 8yrs ago maybe.... Came across a used one for sale when trying to decide used vs new last July.
The Coachmen Catalina version of our Jayco I believe had a sliding door also. And maybe the Puma also.
Keep in mind if looking at a newer model, say no older than 5yrs or so, that a lot of people are asking almost as much as a new trailer with a warranty. Reason is they didn't get the best price, added the extended warranty, then financed it for as long as possible and made the minimum payments. So they still owe a fair amount.
What kind of tv (tow vehicle) do you have? Our 32 BHDS is in 2500/250+ territory. I have read of a few here and there towing with a 1500/150, but there are very few 1500/150 trucks with the proper ratings for this trailer or a comparable. Just make sure you do your homework before signing the papers!
Good luck in your search!