Gebo hatches and portlights - replacement parts

[Cassiopeia]

Our 1997 46E has several missing knobs on opening portlights. They apparently broke during use with PO's. I'm shopping around, searching for sources. These are the sites I've found so far, with varying/minimal success at finding parts.

Here is a link to the knobs and spindle that I'm looking for:
SVB  $34US each. https://www.svb24.com/en/bavaria-knob-for-portlight.html

With most of ours, the spindle broke where the hole is for the pivot (see attached photo)

http://www.myyacht.com.au/7/on-line-store/bavaria-parts
https://www.sailboat-spareparts.com
https://www.clippermarine.co.uk/boat-services/spare-parts

https://greatlakesskipper.com/
http://ibsplexiglass.com/gebo-hatch-portlight/
http://www.gebomarineglazing.nl/products/parts/

I'm wondering if anyone knows of a source for "used" parts like this? I'm open to alternatives. There is one knob and spindle on 1 hatch that is a different kind. Those would be another option, if I knew where to find them. (see photo)

We're in the USA.

[Yngmar]

UK: https://www.oceanchandlery.com/search/for/gebo/

DE: http://www.maritimusboote.de/epages/289397.sf/en_GB/?ObjectPath=/Shops/289397/Categories/Bootsfenster_Frontscheiben_und_Luken/gebo

[Cassiopeia]

Yngmar, thanks for the additional sources.