WTB: Mossberg 500/590 Special Purpose/Persuader series

I know, probably a long shot but just thought I’d see if anyone on here has or knows someone who has something like this before I go out & buy one retail

Ideally looking for 500/590 Special Purpose/Persuader series, 20ga, 12.5" barrel, pistol grip no shoulder/tactical stock

but will consider anything close enough

Also ideally legit serial #s intact and no bodies

See them at Gunshows all the time, next one is in Akron

happen to know when or have a link?

IBL