I also have a Dial 'N Sew. I don't know what model mine is though.
Your machine will take standard 15x1 needles.
It uses regular Class 15 bobbins.
As best as I can tell from your picture it looks as if it takes low shank feet. If so there are gobs of choices including some offset straight stitch for the left parking needle.
My Dial 'N Sew uses high shank feet.
That's a nice machine.
Joe