To be honest, I don’t really understand the problem.
1.) If you really love the sound of the 990‘s, then just keep it.
2.) If the yokes are actually bent, then remove the cups and simply bend them to fit you, the material is very robust and can easily withstand it.
3.) Bayerdynamic is known for making every single component of their headphones available as a spare part and offering them for subsequent purchase. If this yoke actually causes problems then buy a new one:
——————————
This combination is actually not that easy to find in the entry-level price range, to be honest, the studio headphones are often not really suitable for relaxed music enjoyment.
Too boring and mostly tonally too flat.
The best example of this is the DT1990 from Bayer, as studio headphones these are a sound magnifying glass, but as audiophile “relaxation headphones” they pose a risk to your eardrum.
Even with subsequent insulation,
these headphones were too penetrating in the highs.
This type of headphone only becomes interesting with, for example, an Audeze LCD-x, which is also recommended by @pennstac for relaxed listening.
——————
My personal recommendation would be to keep the dt990, buy this spare part for about 11€ and then get a wonderful second option in the headphone range.
A real sound alternative that is really fun and lets you relax while listening to music.

—————
Honestly, as an alternative to the DT990, none of these.
There are wonderful alternatives on the market that have excellent sound qualities and are within a relatively normal price range.
If you would like to knock on the door of Sennheiser, then ask the HD600, which together with the xDuoo TA-26 costs about as much as the new HD660S V2, is superior in terms of sound to this (not only in my opinion) in the mentioned combo.
Then there are the Grado‘s „the Hemp“ or SR325x, which together with ifi amp’s (it doesn’t matter which one) reproduces a very good sound reproduction.
And lastly, my current favorites on the market, in my opinion this is a rough diamond that flies far under the radar of the communiti, is priced in the range of the HD660S V2 or the DT1990, but is toweringly superior to them in all areas.
The iBasso SR3 are outstanding headphones, unpack, put on your head, enjoy!
Next to the Meze 109 pro, these headphones are currently my most used headphones.
———————
Funnily enough, this pairing is a very good one, especially with the newer Planar in-ears on the market.
Got my full recommendation.