Welcome to JOF and sorry that you had to come here with a problem like this.
Yes, you can still get siding for trailers. However, you may not be able to find the exact color or pattern to match you trailer perfectly. I would start with your local dealer or RV repair center to see what they can find for you. Or, there are generic patch panels available on sites like Ebay, etc.
https://www.ebay.com/itm/35274518442...xoCqOoQAvD_BwE
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2017 Jay Feather 7 22BHM Baja/Andersen WD
2018 F150 4x4 3.5L Ecoboost Max Tow
2015 MB Sprinter 2500 Passenger 2.1L Diesel
2007 Ram 2500 4x4 Cummins 5.9L G56