1 is compatible, but might be a bit more squishy feeling (though will give more braking power)
If you can find the part then 2 would be my first call. That brake is closing in on 20 years old now though...!
New gadget released this week, Axle Blockers to ensure rear wheels don't slip forward: https://www.tartybikes.co.uk/other_frame_spares/tartybikes_rd_axle_blocker/c127p14321.html
Can be used in conjunction with the Hybrid tensioner for a super reliable setup on any horizontal dropouts 👍
No problem!
Looks like the CNC backings are going ahead with a small manufacturer about 5 miles from the Tarty warehouse. Great to keep things local where possible 😎
Carbon road cranks for a trials bike? I love a sketchy, inappropriately used Chinese bike part, but that's too far IMO.
Maybe the money would be better spent elsewhere. Rotating weight perhaps? What is the rest of your spec now?