I believe you can still get a P35 under £600 and if you really want the 400/410, let me have words with my rfd, they may have a s/h one, I know they have an Ultralight, I can check it if you want.
When you say you have paid it off, can you get your money back as they have had you over, they cannot take payments for a gun they cannot get, robbing twats.
Phil