Anyone know of a good source of SVG graphics (knobs, faders, buttons etc.), mine here are not great...?

I’ve done raster in the past but I think the ability to resize the GUI to exactly what the user wants is useful. Hence my interest in vector.

Trouble is I can’t seem to get my sliders to look good. My buttons are OK, but the knobs are poor.

I managed to get highlights and even subtle textures onto the knobs, but there’s something visually lacking for me. (I know my jagged edges layer is the wrong color, highlights could be stronger)
This I drew with JUCE 8 library, its not a SVG. I could go with a simple flat look, but thats not fitting with my retro themed plugin to be honest.

Anyone know of a good source of retro style GUI set?
Or, any tips on getting my existing knob better looking?
UI Mother have some good looking stuff but not many SVG, and the one they offer doesn’t appeal to me.
SVGs have to be simplified too for JUCE, right, to not be too GPU heavy, otherwise they lag?