I'd be looking at doing a dimensioned sketch, or even a drawing, of the Victa needle. Sure, the tolerances may need to be guesstimated, but that isn't too difficult.

With that data, it should be possible to find a manufacturer who has a list of their needles with dimensions, as well as what they will fit.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."