Gator. Pretty happy with them: https://www.amazon.com/gp/product/B084HPVQBK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
If your desk is heavy, you can use a clamp on style. You have a couple different options:
Gator Frameworks - 89.99
VIVO- 49.49 - These do not have EVA on the clamps so vibrations will be worse than other models with EVA or fabric to limit vibrations.
Vondynote - 56.99
When it comes to Amazon, I would not purchase any other clamp on mounts besides the 3 listings above. GF should be the best quality - probably not worth an additional 40+ bucks but I would get those if you are not worried about the money.
Gator has some on Amazon. They used to be fulfilled by Amazon and I think half the current listed price but it’s just one seller listing them now. Maybe they’ll be back in normal stock at some point?
https://www.amazon.com/dp/B084HPVQBK/ref=cm_sw_em_r_mt_dp_AWZ-FbPYF2NF6
They are Gator Frameworks. Amazon
I'm sure theres all kinds of acoustic reasons why these are a terrible idea, but I got these for my small music room I love them. Height adjustable and angle adjustable. Goes without saying thought that your desk needs to be the right width