The new JDL 4-2-1 also looks good, not sure how it compares getting one into the UK price wise but will be up there with the ACE/Rogue ones I reckon.
https://jdlautodesign.net/shop/jdl-auto-design-ft86-4-2-1-equal-length-header
Note that this is their UEL vs new 4-2-1 EL rather than vs stock: