You could look into a Dobro branded one. Also National is something to look into. I recommend going used... More bang for your buck. Might not be your cup of tea, but a hollowneck weissenborn style instrument might also fit the bill.
Don't forget to pick up a slide bar (the Lap Dog is a nice entry level one), and personally I use finger picks as well. Totally optional of course.
A few leads. I don't know your price range but these fall between 1 to 2k :
https://reverb.com/item/10272521-dobro-om-27-1980s
https://reverb.com/item/10267607-pri...esonator-dobro
https://reverb.com/item/8777101-orig...end-tim-pierce
Hope this helps, and good luck on your search!