Manufacturers with great customer service

Manley Labs. Upscale Audio. Pure Audio Project.

Martin Logan for my ESL-X speakers.

LUMIN, it has never let me down (which is already very good), but every time I ask about technical aspects and improvements, they always respond and are never slow.

Audio Technica (shame on Shure for stopping making cartridges)

They have retained their body shape over a Loooonnnngggg time, so current production replaceable stylus are available to fit discontinued models

https://www.audio-technica.com/en-eu/support/which-stylus-can-i-use-to-replace-my-discontinued-model/

I can buy a new Boron/MicroLine Stylus for my AT160ML made in the 80’s, or a SLC special line contact if willing to part with more money. 

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Also, their Moving Coil Trade In Program

https://www.audio-technica.com/en-gb/cartridges/styli-accessories/a-t-moving-coil-trade-in-program

https://www.audio-technica.com/en-gb/support/moving-coil-cartridge-repairs/

"Therefore, Audio-Technica offers a comprehensive trade-in program for its customers with moving coil cartridges with worn out styli. Please contact us for more details."

After several years, I sent my AT33PTG/II in, they sold me a new one for just under 50% of new.

Lampizator North America- Fred and Robert are always very helpful

Decware- You can always get a hold of Steve to talk your situation.