This model was made in China and it was also made as a shotgun that had a generic Polychoke on it.
It was known for being an accurate and inexpensive rifle with a few workmanship issues.
But AFAIK there wasn't any 209 conversion unit ever made for it.
And IIRC its early design and importation pre-dated the introduction of using 209's for muzzle loading.

Navy Arms imported many of them over a fairly short period of time which then took many years for them to sell off. But the guns were already made and the manufacturer was no longer in the picture. And Navy Arms didn't have conversion units produced for them.