Replacing daisy model 99 smooth bore barrel for rifled barrel

[Tex D.]

I'm restoring a couple of old Daisy model 99s. I'm trying to find a rifled replacement for the smooth bore barrel. I'm replacing the shot tune assembly so keeping it original isn't an issue. The barrel is obviously .177 I.D. 11.2" long with .260 O.D.. I've been trying to find a crosman nightstalker barrel as I was told it was the right O.D.. I can't find one new, used or otherwise. I don't want to have to turn a oversized barrel down. I'd really like to find one that is factory correct size and reasonably priced. I'm not worried much about the length as I can cut it if necessary. Thank you in advance for all your assistance.