I have an option that may work for you, but unfortunately we do not have a replacement ladder is confirmed to fit your 2005 Thor Tahoe Transport 33WTB.
With that said we do offer quite a few different ladders that may work for like the Stromberg Carlson RV Exterior Ladder w/ Hinges - Aluminum - 99-1/2" T x 12" W - Black # LA-401BA that is 99-1/2" tall x 12" wide but can be shortened to match the dimensions of your current ladder.
If you can provide the dimensions of your current ladder... view full answer...