@mudmixer Off the top of my head some great straight arm exercises are mostly done on rings. If you have access to rings, then ring L sit holds, pelican curls (careful with these, don't overload them), ring rollouts and ring side rollouts (Again, be careful), etc.
You can also work your wrists without handstands with frog holds, pseudo planche push ups, etc. Holding the straight arm of these is also a great overload on the forearms and wrists, and they have quite intuitive progressions.